When a man is pleased with the lot of others, he is dissatisfied with his own, as a matter of course.
Multa ferunt anni venientes commoda secum, Multa recedentes adimiunt. (The years, as they come, bring many agreeable things with them; as they go, they take many away.)
Those who covet much suffer from the want.
Pale Death beats equally at the poor man's gate and at the palaces of kings.
Help a man against his will and you do the same as murder him.
Friends fly away when the cask has been drained to the dregs.