Laudandum adulescentem, ornandum, tollendum. - Cicero

but as in steering a ship one secret of the art is to run before the storm, even if you cannot make the harbour; yet, when you can do so by tacking about, it is folly to keep to the course you have begun rather than by changing it to arrive all the same at the destination you desire:

For when the soul is deprived of emotion, what difference is there — I do not say between man and the beasts of the field, but between man and a stock or a stone, or any such thing?

If no use is made of the labours of past ages, the world must remain always in the infancy of knowledge.