The ultimate authority must always rest with the individual's own reason and critical analysis.

We may encounter many defeats but we must not be defeated.

Those who see the invisible can do the impossible.

Power always thinks it has a great soul and vast views beyond the comprehension of the weak.

If you have no problems, then you have no clue to what is going.

The weak can never forgive. Forgiveness is the attribute of the strong.

Wisdom... comes not from age, but from education and learning.

Real knowledge is to know the extent of one's ignorance.

A person who spends more than he earns is a fool

It is man that makes truth great, not truth that makes man great.

Fear doesn't exist anywhere except in the mind.

Don't criticize what you don't understand, son. You never walked in that man's shoes.

One just needs a little alertness to see and find out: Life is really a great cosmic laughter.

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.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

Achievement brings its own anticlimax.

Not everything that can be counted counts, and not everything that counts can be counted.

It seems essential, in relationships and all tasks, that we concentrate only on what is most significant and important.

Tact is the knack of making a point without making an enemy.

Common sense is in spite of, not as the result of education.

Take care of the pieces well. The whole will take care of itself.