Demosthenes

He who confers a favor should at once forget it, if he is not to show a sordid ungenerous spirit. To remind a man of a kindness conferred and to talk of it, is little different from reproach.

Beware lest in your anxiety to avoid war you obtain a master.

Every advantage in the past is judged in the light of the final issue.

Nothing is easier than self-deceit. For what each man wishes, that he also believes to be true.

You cannot have a proud and chivalrous spirit if your conduct is mean and paltry; for whatever a man's actions are, such must be his spirit.

All speech is vain and empty unless it be accompanied by action.

The fact speak for themselves.

The easiest thing of all is to deceive one's self; for what a man wishes he generally believes to be true.

The man who has received a benefit ought always to remember it, but he who has granted it ought to forget the fact at once.

Small opportunities are often the beginning of great enterprises.

There is a great deal of wishful thinking in such cases; it is the easiest thing of all to deceive one’s self.