On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.
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.
This world is not for cowards. Do not try to fly. Look not for success or failure. Join yourself to the perfectly unselfish will and work on. Know that the mind which is born to succeed joins itself to a determined will and perseveres. You have the right to work, but do not become so degenerate as to look for results. Work incessantly, but see something behind the work. Even good deeds can find a man in great bondage. Therefore be not bound by good deeds or by desire for name and fame. Those who know this secret pass beyond this round of birth and death and become immortal.
That is their way, those plagues, those scientists - peg, peg, peg - dig, dig, dig - plod, plod, plod. I wish I could catch a cargo of them for my place; it would be an economy. Yes, for years, you see. They never give up. Patience, hope, faith, perseverance; it is the way of all the breed.
Wait with patience and love and strength. If helpers are not ready now, they will come in time. Why should we be in a hurry? The real working force of all great work is in its almost unperceived beginnings.
Have fire and spread all over. Work, work. Be the servant while leading, be unselfish, and never listen to one friend in private accusing another. Have infinite patience, and success is yours.