No one can speak well, unless he thoroughly understands his subject.

Friendship improves happiness and abates misery, by the doubling of our joy and the dividing of our grief.

Not to know what has been transacted in former times is to continue always a child.

Virtue is its own reward.

It is certain that memory contains not only philosophy, but all the arts and all that appertain to the use of life.

When confronted by a hungry wolf, it is unwise to goad the beast, as Cato would have us do. But it is equally unwise to imagine the snarling animal a friend and offer your hand, as Pompey does." "Perhaps you would have us climb a tree!

There is no more sure tie between friends than when they are united in their objects and wishes.