Experience teaches us that it is much easier to prevent an enemy from posting themselves than it is to dislodge them after they have got possession.

You learn from a conglomeration of the incredible past - whatever experience gotten in any way whatsoever.

We should not look back unless it is to derive useful lessons from past errors, and for the purpose of profiting by dearly bought experience.

Avoid the precepts of those thinkers whose reasoning is not confirmed by experience.

Nature is full of infinite reasons which have not yet passed into experience.

Experience is a truer guide than the words of others.