Do not use a hatchet to remove a fly from your friend’s forehead.
Do not have evil-doers for friends, do not have low people for friends: have virtuous people for friends, have for friends the best of men.
Two friends, two bodies with one soul inspired.
Foresake not an old friend, for the new is not comparable unto him. A new friend is as new wine: when it is old thou shalt drink it with pleasure.
The amity that wisdom knits not, folly may easily untie.
It is more shameful to distrust our friends than to be deceived by them.
Never do a wrong thing to make a friend or to keep one.
Go often to the house of thy friend, weeds choke the unused path.
If a friend is in trouble, don’t annoy him by asking if there is anything you can do. Think up something appropriate and do it.
Be slow to fall into friendship; but when thou art in, continue firm and constant.