He is happy in his wisdom who has learned at another's expense.
You have eaten a meal dangerously seasoned. [You have laid up a grief in store for yourself.]
He who falls in love meets a worse fate than he who leaps from a rock.
Flying without feathers is not easy: my wings have no feathers.
He whom the gods love dies young, while he is in health, has his senses and his judgments sound.
He who is most on his guard is often himself taken in.