“In all things success depends on previous preparation, and without such previous preparation there is sure to be failure.”

“Only after winter comes do we know that the pine and the cypress are the last to fade.”

“I am not bothered by the fact that I am not understood. I am bothered when I do not know others.”

“Reviewing what you have learned and learning anew, you are fit to be a teacher.”

“They who know the truth are not equal to those who love it, and they who love it are not equal to those who delight in it.”

“When you have faults, do not fear to abandon them.”

“Optimism is the faith that leads to achievement; nothing can be done without hope.”

“One can never consent to creep when one feels an impulse to soar.”

“When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.”

“You may never know what results come of your actions. But if you do nothing, there will be no result.”

“What man actually needs is not a tensionless state but rather the striving and struggling for some goal worthy of him. What he needs is not the discharge of tension at any cost, but the call of a potential meaning waiting to be fulfilled by him.”

“The time is always right to do what's right.”