Seneca Moral Epistles 9:3
Letters from a Stoic
But he need never lack friends, for it lies in his own control how soon he shall make good a loss. Just as Phidias, if he lose a statue, can straightway carve another, even so our master in the art of making friendships can fill the place of a friend he has lost. If you ask how one can make oneself a friend quickly, I will tell you, provided we are agreed that I may pay my debt at once and square the account, so far as this letter is concerned. Hecato, says: 'I can show you a philtre, compounded without drugs, herbs, or any witch's incantation: 'If you would be loved, love.'
Matthew 7:12
10 Or if he asks for a fish, will give him a snake? 11 If you then, although you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him! 12 In everything, treat others as you would want them to treat you, for this fulfills the law and the prophets. 13 “Enter through the narrow gate because the gate is wide and the way is spacious that leads to destruction, and there are many who enter through it. 14 How narrow is the gate and difficult the way that leads to life, and there are few who find it!