You should not be a friend to your friend's enemies but a friend to your friend's friends.

If you have a friend then you should trust him with your secrets if you want him to be a good friend. You should visit him often and give him gifts.

If your friends are mean then you should repay them in the same manner. If you suspect someone of lying to you then you should smile at him and say the exact opposite of what you would have said if he were telling the truth, that is you should kiss his ass.

If you don't have any friends then you have nothing because a friend is as gold.