He can do most who has most power.
Flying without feathers is not easy: my wings have no feathers.
That man is worthless who knows how to receive a favor, but not how to return one.
He who seeks for gain, must be at some expense.
Love has both its gall and honey in abundance: it has sweetness to the taste, but it presents bitterness also to satiety.
In everything the middle road is best.