Science is organized knowledge. Wisdom is organized life.

The absent are never without fault, nor the present without excuse.

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

The only real mistake is the one from which we learn nothing.

Those who see the invisible can do the impossible.

In order to change the world, you have to get your head together first

In anger we should refrain both from speech and action.

True knowledge lies in knowing how to live.

Turn your wounds into wisdom.

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

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

You have heard that it was said, 'Eye for eye, and tooth for tooth.' But I tell you, do not resist an evil person. If someone strikes you on the right cheek, turn to him the other also.

Man is not the creature of circumstances, Circumstances are the creatures of men.

Intelligence is the ability to adapt to change.

Rational discussion is useful only when there is a significant base of shared assumptions.

A friend to all is a friend to none

Great dreams of great dreamers are always transcended.

The very essence of instinct is that it's followed independently of reason.

If you are a parent, open doors to unknown directions to the child so he can explore. Don't make him afraid of the unknown,give him support.

You can be rich in spirit, kindness, love and all those things that you can't put a dollar sign on.

A good teacher protects his pupils from his own influence.