There are no limitations to the mind except those we acknowledge.

Those who cannot work with their hearts achieve but a hollow, half-hearted success that breeds bitterness all around.

No one can make you feel inferior without your consent.

Honesty is the first chapter in the book of wisdom.

It has seemed to be more necessary to have regard to the weight of words rather than to their number.

Moderation in temper is always a virtue; but moderation in principle is always a vice.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

Happiness is not an ideal of reason, but of imagination.

Do not reveal what you have thought upon doing, but by wise council keep it secret being determined to carry it into execution.

Destiny is not a passive agent that lies in the lap of the Gods, but is an active instrument that lies in your own hands to shape as you will.

There is an art, or rather a knack to flying. The knack lies in learning how to throw yourself at the ground and miss.

Promises are like crying babies in a theater, they should be carried out at once.

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

The only limit to our realization of tomorrow will be our doubts of today.

Reflect upon your present blessings, of which every man has many; not on your past misfortunes, of which all men have some.

Language is very powerful. Language does not just describe reality. Language creates the reality it describes.

There is no question climate change is happening. The only arguable point is what part humans are playing in it.

Never do anything when you are in a temper, for you will do everything wrong.

Where wisdom reigns, there is no conflict between thinking and feeling.

All great achievements require time.

Do not say a little in many words, but a great deal in few!