Thinking and spoken discourse are the same thing, except that what we call thinking is, precisely, the inward dialogue carried on by the mind with itself without spoken sound.
To think truly is noble and to be deceived is base.
A State would be happy where philosophers were kings, or kings philosophers.
Not only is the old man twice a child, but also the man who is drunk.
Love is a serious mental disease.
Every serious man in dealing with really serious subjects carefully avoids writing. ... There does not exist, nor will there ever exist, any writing of mine dealing with this subject.