I know that I know nothing.
Athens
It would be better for me that the whole world should disagree with me than that I, being one, should be out of harmony with myself.
He is richest who is content with the least, for contentment is the wealth of nature.
Wonder is the beginning of wisdom.
Not-knowing is true knowledge. Presuming to know is a disease.
The only true wisdom is in knowing you know nothing.
To know thyself is the beginning of wisdom.