If his decision is correct, he will win the battle, even if it lasts longer than expected. If his decision is wrong, he will be defeated and he will have to start all over again-only this time with more wisdom. But once he has started, a warrior of the light perseveres until the end.
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.
Your good mother tells me you are feeling very badly in your new situation. Allow me to assure you it is a perfect certainty that you will, very soon, feel better - quite happy - if you only stick to the resolution you have taken to procure a military education.... On the contrary, if you falter, and give up, you will lose the power of keeping any resolution, and will regret it all your life.
It was a harder day's journey than yesterday's, for there were long and weary hills to climb; and in journeys, as in life, it is a great deal easier to go down hill than up. However, they kept on, with unabated perseverance, and the hill has not yet lifted its face to heaven that perseverance will not gain the summit of at last.
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. . .
Know it for certain that without steady devotion for the Guru and unflinching patience and perseverance, nothing is to be achieved. You must have strict morality.