Jack Black on losing his brother to AIDS: 'The worst thing I can possibly imagine'

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Jack Black Goes Off the Rails in 'Goosebumps' Interview

It has not always been an easy life for Jack Black.

The 46-year-old actor is opening up to Parade about his struggles with loss and drug addiction earlier in life.

A child of divorce, Jack Black found himself falling in with the wrong people and becoming hooked on harder drugs at a young age.

"I remember just lots of turmoil from that time period," he says of when he was just 14 years old. "I was having a lot of troubles with cocaine... I was hanging out with some pretty rough characters. I was scared to go to school [because] one of them wanted to kill me. I wanted to get out of there."

WATCH: This Jack Black 'Goosebumps' Interview Might Be Wilder Than the Movie!

Black says being able to turn to his school therapist helped him get his life back together.

"I spilled my guts, telling him I felt guilty about stealing from my mom to get money for cocaine," he confesses. "I cried like a baby. It was a huge release and a huge relief. I left feeling euphoric, like an enormous weight had been lifted from me. It changed me."

Black has also faced tragedy through the death of his brother, Howard, to AIDS, in 1989. The actor says this tragic experience has caused him to be even more attentive to his own children -- Samuel, 9, and Thomas, 7.

WATCH: The First 'Goosebumps' Trailer

"Sometimes I think maybe I'm a little bit of a helicopter dad hovering above my kids and making sure that they never are in harm's way," he says. "But losing a family member is the worst thing I could imagine."

"I have two gay siblings: my big sister, Rachel, and my big brother, Howard," Black continues. "He was a big influence on me. He took me to my first rock concert."

Eight years separated Black and his brother Howard, who died at age 31.

"[Death] didn't happen quickly. We all saw the deterioration. He was only 31. So very young," Black admits. "We were robbed of something precious. It was devastating. It was hard for all of us, but it was hardest for my mom when we lost Howard. She's never really recovered."

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What keeps Black going, through all of his struggles, is his amazing sense of adventure.

"If you lose the fun of the journey, then there's no point in going on," he says. "It's the thrill that I love the most. I've been on this ride that's been really magical. If there were no money? I'd be putting on shows!"

And Black brings that sense of joy and silliness to his interactions with others. ET caught up with actor in September while he was promoting his new movie, Goosebumps, which he believes does justice to the long running young adult "scary" books series.

WATCH: Ken Marino Gets 'Goosebumps' Talking About His New Role

"The script is really funny and scary and cool and awesome, and I wanted to be a part of it," Black told ET. "I really connected with the character, R.L. Stine."

Goosebumps hits theaters Oct. 16.

Watch the video above.

See photos of Jack Black throughout his career:

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Jack Black through the years
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Jack Black on losing his brother to AIDS: 'The worst thing I can possibly imagine'
Show host Jack Black performs a musical number to open the MTV Movie Awards in Los Angeles, Saturday, June 1, 2002. (AP Photo/Mark J. Terrill)
Show hosts Sarah Michelle Gellar, left, and Jack Black pose for photographers backstage at the MTV Movie Awards in Los Angeles, Saturday, June 1, 2002. (AP Photo/Reed Saxon)
Jack Black mugs for photographers before the premiere of the film, "Jackass: The Movie," Monday, Oct. 21, 2002, in the Hollywood section of Los Angeles. (AP Photo/Rene Macura)
Comedians Will Ferrell, right, and Jack Black rehearse on the stage during presenter rehearsals for the 76th annual Academy Awards, late Friday, Feb. 27, 2004, at the Kodak Theatre in Los Angeles. The Oscars as on Sunday, Feb. 29. (AP Photo/Kevork DJansezian)
Jack Black, left, and Kyle Gass, second from left, of the rock band Tenacious D wears superhero costumes to promote their new DVD release "Tenacious D: The Complete Masterworks," in New York, Monday November 3, 2003. The duo joked they would fast for 45 days above Times Square or until their album reached platinum status. Black's film comedy "School of Rock," was still in the top ten box office hits last weekend, coming in at 8.(AP Photo/Bebeto Matthews)
Actor Jack Black jokes with the media, as he arrives at London's Leicester Square, Wednesday Jan. 14, 2004, for the European premiere of his latest film, "School of Rock."(AP Photo/Max Nash)
Actor Jack Black, left, and director Peter Jackson from the film "King Kong" appear on stage during MTV's "Total Request Live" show at the MTV Times Square Studios, Monday, Dec. 5, 2005 in New York. (AP Photo/Jeff Christensen)
Actor Jack Black smiles as he watches the Atlanta Hawks play the Los Angeles Lakers, Wednesday night, Feb. 15, 2006, in Los Angeles. The Hawks won 114-110. (AP Photo/Mark J. Terrill)
Jack Black, left, and Peter Stormare, cast members in the new film "Nacho Libre," pose together at the premiere of the film at Grauman's Chinese Theatre in Los Angeles, Monday, June 12, 2006. (AP Photo/Chris Pizzello)
**FILE**Actor-slash-rocker Jack Black yells while posing in the press room during the MTV Video Music Awards Aug. 28, 2003, in New York. Black will host this year's version of the anything-can-happen MTV Video Music Awards extravaganza, set for Aug. 31 in New York, MTV announced Thursday, Aug. 10, 2006.(AP Photo/Mary Altaffer)
Actor Jack Black poses for photographers after performing the role of King Herod in a production of "Jesus Christ Superstar" at the Ricardo Montalban Theatre in the Hollywood section of Los Angeles on Sunday, Aug. 13, 2006. (AP Photo/Matt Sayles)
You got a problem with the D? (AP Photo/Nick Ut)
Jack Black and Tenacious D perform at the 2006 American Music Awards in Los Angeles, on Tuesday, Nov. 21, 2006. (AP Photo/Kevork Djansezian)
** EMBARGOED AT THE REQUEST OF THE ACADEMY OF MOTION PICTURE ARTS AND SCIENCES FOR USE UPON CONCLUSION OF THE ACADEMY AWARDS TELECAST ** Jack Black, left, John C. Reilly, center, and Will Ferrell perform during the 79th Academy Awards Sunday, Feb. 25, 2007, in Los Angeles. (AP Photo/Mark J. Terrill)
Jack Black poses for a portrait during the Sundance Film Festival in Park City, Utah on Saturday Jan. 19, 2008. (AP Photo/Amy Sancetta)
Actor Jack Black poses for a portrait in Los Angeles on Friday, April 25, 2008. Black voiced the lead character, Po, in the upcoming animated film "Kung Fu Panda" which will be released on June 6, 2008. (AP Photo/Matt Sayles)
Host Jack Black performs at the sixth annual Video Game Awards at Sony Picture Studios in Culver City, Calif., on Sunday Dec. 14, 2008. (AP Photo)
Actor Jack Black arrives at the premiere of the animated feature film "Monsters vs. Aliens" in Universal City, Calif. on Sunday, March 22, 2009. (AP Photo/Dan Steinberg)
Jack Black accepts the award for best voice for his work in "Brutal Legend" at Spike TV's Video Game Awards on Saturday, Dec. 12, 2009, in Los Angeles. (AP Photo/Chris Pizzello)
**COMMERCIAL IMAGE** In this photograph taken by AP Images for Blizzard, Kyle Gass, left, and Jack Black of the band Tenacious D backstage before the closing ceremonies on the second day of BlizzCon 2010 in Anaheim, Calif. on Saturday, Oct. 23, 2010. (Casey Rodgers / AP Images for Blizzard)
Actors Angelina Jolie, right, and Jack Black, from the upcoming film "Kung Fu Panda 2", pose for a portrait in Glendale, Calif. on Thursday, April 14, 2011. (AP Photo/Matt Sayles)
Actor Jack Black arrives at the UNICEF Playlist with the A-List benefit in Los Angeles on Tuesday, May 17, 2011. Funds raised at the event will be used for the UNICEF Schools for Africa campaign. (AP Photo/Dan Steinberg)
Jack Black, of musical group Tenacious D, performs on stage at Spike's 10th Annual Video Game Awards at Sony Studios on Friday, Dec. 7, 2012, in Culver City, Calif. (Photo by Chris Pizzello/Invision/AP)
Emcee Jack Black, left, poses with co-host Stephen Stills at the Light Up The Blues Concert - An Evening of Music Benefitting Autism Speaks, at Club Nokia on Saturday, April 13, 2013 in Los Angeles. (Photo by Chris Pizello/Invision/AP)
Actor Jack Black speaks onstage during the 17th Annual Hollywood Film Awards Gala at the Beverly Hilton Hotel on Tuesday, Oct. 22, 2013 in Beverly Hills, Calif. (Photo by Frank Micelotta/Invision/AP)
Jack Black at Sony's "Goosebumps" presentation at 2014 Comic-Con on Thursday, July 24, 2014, in San Diego, CA. (Photo by Alexandra Wyman/Invision for Sony Pictures/AP Images)
Tanya Haden and Jack Black arrive to the Hammer Museum's "Gala In The Garden" on Saturday, Oct. 11, 2014 in Los Angeles. (Photo by John Shearer/Invision/AP)
Jack Black arrives at the 72nd annual Golden Globe Awards at the Beverly Hilton Hotel on Sunday, Jan. 11, 2015, in Beverly Hills, Calif. (Photo by Jordan Strauss/Invision/AP)
NEW YORK, NY - MAY 5: Jack Black at ABC"s Good Morning America in New York City on May 5, 2015. Credit: RW/MediaPunch/IPX
Jack Black arrives at the World Premiere of "Goosebumps" at the Regency Village Theatre on Sunday, Oct. 4, 2015, in Los Angeles. (Photo by Rich Fury/Invision/AP)
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