David Millar said this quote
“ I'd just killed some of the best riders in the world - and I was clean. I'd taken nothing - no EPO, no cortisone, no testosterone, no painkillers, no caffeine. I had justified to myself that I was a great rider without drugs - yet perversely given myself the green light to dope again. I'd proved what I could do clean - how much more could I do if I was doped? ”