The longing to behold this pre-established harmony [of phenomena and theoretical principles] is the source of the inexhaustible patience and perseverance with which Planck has devoted himself ... The state of mind which enables a man to do work of this kind is akin to that of the religious worshiper or the lover; the daily effort comes from no deliberate intention or program, but straight from the heart.
A principle is a principle and in no case can it be watered down because of our incapacity to live it in practice. We have to strive to achieve it, and the striving should be conscious, deliberate and hard.
Nobody trips over mountains. It is the small pebble that causes you to stumble. Pass all the pebbles in your path and you will find you have crossed the mountain. The mind does not create what it perceives, anymore than the eye creates the rose.
I have seen your despatch expressing your unwillingness to break your hold where you are. Neither am I willing. Hold on with a bull-dog gripe, and chew & choke, as much as possible.
"Genius is divine perseverance." Divine patience I believe he originally used, perseverance is better in my opinion. Genius I cannot claim nor even extra brightness but perseverance all can have.
The real test is not whether you avoid failure, because you won't. It's whether you let it harden or shame you into inaction, or whether you learn from it. . .
I shall not do more than I can, and I shall do all I can to save the government, which is my sworn duty as well as my personal inclination. I shall do nothing in malice. What I deal with is too vast for malicious dealing.
When any two young people take it into their heads to marry, they are pretty sure by perseverance to carry their point, be they ever so poor, or ever so imprudent, or ever so little likely to be necessary to each other's ultimate comfort.
Perfect health, sincerity, honesty, straightforwardness, courage, disinterestedness, unselfishness, patience, endurance, perseverance, peace, calm, self control are all things that are taught infinitely better by example than by beautiful speeches.