Certainly, if he still has himself, a man of understanding has lost nothing. - Michel de Montaigne

The contradictions of judgments, then, neither offend nor alter, they only rouse and exercise me. We evade correction, whereas we ought to offer and present ourselves to it, especially when it appears in the form of conference, and not of authority.

A man with nothing to lend should refrain from borrowing.

It should be noted that children at play are not playing about; their games should be seen as their most serious-minded activity.