Ambition is not in itself an evil; nor is he to be condemned whose spirit prompts him to seek fame by worthy and honourable ways.

Be careful how you do one man a pleasure which must needs occasion equal displeasure in another. For he who is thus slighted will not forget, but will think the offence to himself the greater in that another profits by it; while he who receives the pleasure will either not remember it, or will consider the favour done him less than it really was.

Conspiracies, since they cannot be engaged in without the fellowship of others, are for that reason most perilous; for as most men are either fools or knaves, we run excessive risk in making such folk our companions.

...be more guided by hope than fear.

Let no one trust so entirely to natural prudence as to persuade himself that it will suffice to guide him without help from experience.

Affairs that depend on many rarely succeed.

Even though many people prove to be ungrateful, do not let that stop you from benefiting others-for not only is beneficence in itself a noble and almost divine quality, it may also happen that while you practice it, you will encounter someone so grateful that he will make up for all the others' ingratitude.