Never injure

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Never injure a friend, even in jest.

Your face is dirty

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Only your friends will tell you when your face is dirty.

Nothing but heaven…

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Nothing but heaven itself is better than a friend who is really a friend.

Not equal

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Have no friends not equal to yourself.

An antidote

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The antidote for fifty enemies is one friend.

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In classical times, friendship seems to have occupied a central place in the lives of great thinkers, possibly because most of them were men, and women were regarded, on the whole, as inferior beings, rather than equal companions (with a few notable exceptions). It is good for us to share their memories, which are as thought-provoking today as when they were first written.