Lance Armstrong comes clean about his doping dishonesty in documentary trailer: 'We all lied'

Lance Armstrong is coming clean on his truthfulness.

A surprisingly candid Armstrong was profiled on Night 1 of the two-part ESPN documentary "Lance," with doping one of the first topics discussed on the show. While doping was touched on throughout the episode, it seems like we're going to get more insight into the mentality of Armstrong and the rest of the dopers this weekend.

With Part 2 of the doc hitting television setsSunday, ESPN teased one question that everyone's wondering: Why lie?

Nobody dopes and is honest. You're not. The only way you can dope and be honest is if nobody ever asks you, which is not realistic. The second somebody asks you, you lie. Now, you might — it might be one lie, because you answer it once, or in my case, it might be 10,000 lies because you answer it 10,000 times. And then you take it a step further, and you reinforce it, "F— you, you don't ever f—ing ask me that question again." And then you go sue somebody. So that's why it was 100 times worse. 'Cause we all lied.

MORE: Armstrong unaware if doping caused cancer

Armstrong's once-celebrated cycling career is tarnished, as the (now stripped) seven-time Tour de France winner was under investigation by USADA and later admitted to doping resulting in the stripping of the titles in 2012. It also resulted in a lifetime ban from cycling.

While other former teammates of Armstrong admitted to doping — and there's still rampant speculation as to how clean the sport is today — none have been quite as profiled and scrutinized as Armstrong. We'll see if answers continue to come to light on Sunday.