The most difficult thing is to know what we do know, and what we do not know.

Our ancestors were very rich and eminent people, and they left us an enormous inheritance, which we have completely forgotten, especially since the time when we began to consider ourselves the descendants of a monkey.

The most difficult thing is to know what we do know, and what we do not know.

Think about death. You do not know how much time remains to you. And remember that if you do not become different, everything will be repeated again, all foolish blunders, all silly mistakes, all loss of time and opportunity - everything will be repeated with the exception of the chance you had this time, because chance never comes in the same form.You will have to look for your chance next time. And in order to do this, you will have to remember many things, and how will you remember then if you do not remember anything now?

There is no tyranny more ferocious than the tyranny of morality. Everything is sacrificed to it.

It is by overcoming obstacles that man develops those qualities he needs.

You can understand other people only as much as you understand yourself and only on the level of your own being. This means you can judge other people's knowledge but you cannot judge their being. You can see in them only as much as you have in yourself. But people always make the mistake of thinking they can judge other people's being. In reality, if they wish to meet and understand people of a higher development than themselves they must work with the aim of changing their being.