The simple things are also the most extraordinary things, and only the wise can see them.

Each problem that I solved became a rule which served afterwards to solve other problems.

Fear doesn't exist anywhere except in the mind.

A house divided against itself cannot stand.

He who chooses the beginning of the road chooses the place it leads to.

What's done can't be undone.

Judge a man by his questions rather than by his answers.

So many people have this idea: I want to achieve something great or be somebody great. And they neglect the step that leads to greatness. They don't honor this step at this moment because they have this idea of some future moment where they are going to be great.

What a man does for others, not what they do for him, gives him immortality.

In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

All the great things are simple, and many can be expressed in a single word: freedom; justice; honor; duty; mercy; hope.

The impossible could not have happened, therefore the impossible must be possible in spite of appearances.

Everybody is ignorant, only on different subjects.

As the soft yield of water cleaves obstinate stone, So to yield with life solves the insolvable: To yield, I have learned, is to come back again.

If we do not lay out ourselves in the service of mankind whom should we serve?

The more skilled you are at something, the worse you are at it when showing someone.

No one cares how much you know, until they know how much you care

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Knowing yourself is the beginning of all wisdom.

Gravity is only the bark of wisdom's tree; but it preserves it

One who gains strength by overcoming obstacles possesses the only strength which can overcome adversity.