Moral. A prince that does not secure Friends to Himself while he is in Power and Condition to oblige them, must never expect to find Friends, when he is Old and Impotent, and no longer Able to do them any Good. If he Governs Tyrannically in his Youth, he will be sure to be Treated Contemptuously in his Age; and the Baser his Enemies are, the more Insolent, and Intollerable will be the Affront.
[more info; you can read L'Estrange's Reflexion at the online book.]
And here is an illustration by Francis Barlow: