I heard this from an acquaintance of mine. He has a lot more money than I do, but I often disagree with his ethics on treating other people. He told me this quote shortly after telling me a way I could try and get one friend to pay me to do some work for him, and then get another friend to either do it for half that cost, or possibly free. So I'd be taking one friends money to do a job and getting another friend to do it either for free or at a much lower rate so i could keep most of the fee the first friend was willing to pay.
The preceding story gave me a bad first impression on this quote.
I have been staring at the original version of this quote forever which states that discipline is doing what you 'dont want' to do, when you dont want to do it. I realised that is totally wrong and doesn't really make any sense, infact that isn't discipline that is sadism. If you have no motivation/inspiration/need to do something then why would you ever force yourself to do it? So yes, a slight edit on a pretty famous quote but a much needed correction I feel. Come at me.