Seven years of silent inquiry are needful for a man to learn the truth, but fourteen in order to learn how to make it known to his fellow-men.
All the gold which is under or upon the earth is not enough to give in exchange for virtue.
Seek truth while you are young, for if you do not, it will later escape your grasp
Education is teaching our children to desire the right things.
Let no one ignorant of Mathematics enter here.
Consider how great is the encouragement which all the world gives to the lover; neither is he supposed to be doing anything dishonourable; but if he succeeds he is praised, and if he fail he is blamed.