The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to enable him to put the other somewhat higher.

• ambition
• progress

Perhaps the most valuable result of all education is the ability to make yourself do the thing you have to do, when it ought to be done, whether you like it or not; it is the first lesson that ought to be learned; and however early a man's training begins, it is probably the last lesson that he learns thoroughly.

• discipline

God give me strength to face a fact though it slay me.

• science

Time, whose tooth gnaws away at everything else, is powerless against truth.

• truth
• time