In my personal experience....
I have a quite a few friends who juice, and it is very obvious to tell the ones that keep on training and the ones who don't. I hung out with this kid last summer every weekend he was ripped and looked really good, went to school for a year, when i saw him this summer you couldn't even tell that he touched a steroid in his life. BTW, he has done 4 cycle...he is just plain stupid. When i asked him what happen, he said what are you talking about...give me a few weeks i just started....my next cycle.
Moral of the story...if you stop and get discourage eveytime your strength drops, you will never move forward. Just keep training and make every cycle better than the last, not bigger, just better....
...but some people will never learn.
M56M