Philosophy begins in wonder.
Every heart sings a song, incomplete, until another heart whispers back.
Maximize the power of the beliefs that strengthen you and neutralize those that weaken you.
The first step in learning is the destruction of human conceit.
Prefer diligence before idleness, unless you esteem rust above brightness.
My good friend, you are a citizen of Athens, a city which is very great and very famous for its wisdom and power - are you not ashamed of caring so much for the making of money and for fame and prestige, when you neither think nor care about wisdom and truth and the improvement of your soul?