Striving

"Were there none who were discontented with what they have, the world would never reach for anything better." - Florence Nightingale

"Measured objectively, what a man can wrest from the Truth by passionate striving is utterly infinitesimal. But the striving frees us from the bonds of self and makes us comrades of those who are the best and the greatest." - Albert Einstein

"Difficulty is the excuse history never accepts." - Edward Murrow