(Ok well its not much of a collection atm but ill add to it over time)
"I dont get a great deal of enjoyment out of jogging round and round for 3 hrs really, I mean this is kind of a drudge really ... I only do it because you know I want to perform well." - Ed Whitlock, source: Interview: Marathon Talk
"Hills are speedwork in disguise." - Frank Shorter
"If you want to race at a fast pace, you need to train at a fast pace." - Hal Higdon
"The only time we fail is when we dont give it our best effort" - Dean Karnazes, source: Interview: Marathon Talk.
"I know it hurts it's supposed to hurt, I know it's hard it's supposed to be hard" - , source: YouTube
"Running doesnt get easier, it just gets Faster" - Coaches the world over, source: unknown
“Success isn't how far you got, but the distance you traveled from where you started.” - Steve Prefontaine
"Patience is not perceived as a "sexy" attribute to have, but it beats boom-n'-bust every which way. Cultivate it in spades." - John Walsh aka Hadd, source: Lets Run