For however often a man may receive an obligation from you, if you refuse a request, all former favors are effaced by this one denial.

Glory ought to be the consequence, not the motive of our actions.

It is difficult to retain what you may have learned unless you should practice it. -Difficile est tenere quae acceperis nisi exerceas

Everyone is prejudiced in favor of his own powers of discernment.

It is better to excel in any single art than to arrive only at mediocrity in several, so moderate skill in several is to be preferred where one cannot attain to perfection in any.

For however often a man may receive an obligation from you, if you refuse a request, all former favors are effaced by this one denial.

Honor puts us under an obligation as binding as necessity is for other people.