I know one thing, that I know nothing.

I know that I am intelligent, because I know that I know nothing.

To harm another is to harm oneself

I was afraid that by observing objects with my eyes and trying to comprehend them with each of my other senses I might blind my soul altogether.

When you want success as badly as you want the air, then you will get it. There is no other secret of success.

To fear death is nothing other than to think oneself wise when one is not. For it is to think one knows what one does not know. No one knows whether death may not even turn out to be the greatest blessings of human beings. And yet people fear it as if they knew for certain it is the greatest evil.

A disorderly mob is no more an army than a heap of building materials is a house