Following the release of his comeback album Changes, Justin Bieber sat down for a lengthy interview with Zane Lowe. During the 40-minute chat, the Canadian pop star opened up about his marriage, relating to the rise of Billie Eilish, and why he canceled the last dates of his 2017 tour.

"I was really tired emotionally, physically, and I was sick and I didn't realize I was sick," he told Zane when asked why he canceled the tour. "So I had Epstein-Barr, which is like, it's called Mono. And then I have Lyme disease. So it was that, it was just the exhaustion of just being on tour, and then it was just everything compounded I think, to be honest." Bieber recently opened up about contracting Lyme disease, and has said he's been on the mend.

"I mean I pushed through the last month or two, and I couldn't believe I pushed through that. So when they were like, 'We got to still do stadiums,' I was like, 'This is not going to be good. I'm not going to be able to make it through that,'" he continued. Bieber struggled to figure out what was wrong with him for a while, and as a result, he admitted he "felt shitty all the time." Eventually, he was able to bounce back thanks to the support of his wife Hailey Baldwin, but not before he went through a particularly dark patch.

"It was bad," he said when asked about the tough period he went through, in which he admitted to abusing drugs and suffering from depression. "I don't know if I'd be alive, for sure. It was dark, really dark." He didn't expand too much on those thoughts, moving on to more positive topics before once again taking the conversation to a darker place.

Later on, Bieber said that he doesn't "believe that humans are good." He clarified by saying he didn't want his words to be twisted and make it seem like he's saying "humanity's not good," but he would frequently fight himself fighting temptation. "I got to fight to not be that," he said. "Maybe that's me personally being that way, and I just accept that and I just know that's not who I am, because humanity, it's come to a place of being really... It's broken. I mean, look around... There's just so much pain."

Near the end of the interview, he kept things more positive when Zane asked where he hopes to be at the end of the decade. "I just feel like there's so much to look forward to," he said, gesturing to Hailey upon revealing he wants to start a family. "I'm emotional thinking about it. I'm just excited to have babies with you [Hailey]... We are blessed, you know?"

Watch the full interview above.