For those about to take charge of public affairs

Cicero, On Duties, Book I, p. 33

In general those who are about to take charge of public affairs should hold fast to Plato's two pieces of advice: first to fix their gaze so firmly on what is beneficial to the citizens that whatever they do, they do with that in mind, forgetful of their own advantage. Secondly, let them care for the whole body of the republic rather than protect one part and neglect the rest.

The virtue that fights on behalf of fairness

Cicero, On Duties, Book I, p.26

The Stoics define courage will when they call it the virtue which fights on behalf of fairness...a spirit which is ready to face danger, but is driven by selfish desire rather than common benefit should be called not courage, but audacity...it is a hateful fact that loftiness and greatness of spirit all too easily give birth to willfulness and excessive desire for pre-eminence...the loftier a man's spirit, the more easily he is driven by desire for glory to injustice. This is slippery ground indeed: scarcely a man can be found who, when he has undertaken toil and confronted dangers, does not yearn for glory as a kind of payment for his achievements.

Screwing your workers and giving to charity

Cicero, On Duties, Book I, p.19

Those who, in order to be liberal towards some, harm others, fall into the same injustice as if they had converted someone else's possessions to their own account. There are, though, many especially those greedy for renown and glory, who steal from one group the very money that they lavish upon another.

Put up with being perceived as ignorant

Epictetus, Enchiridion, Chapter 13:

If you want to make progress, put up with being perceived as ignorant or naive in worldly matters, don't aspire to a reputation for sagacity. If you do impress others as somebody, don't altogether believe it. You have to realize, it isn't easy to keep your will in agreement with nature, as well as externals. Caring about the one inevitably means you are going to shortchange the other.

Compare with Gracian, who would suggest we hide the depth of our knowledge, but for strategic reasons, and in order to increase our ability to manipulate and surprise others.

A warning about what makes other people tick...

Epictetus, Discourses, Book IV, 13:

...if you see someone fond of externals, someone who values them over their own moral integrity, you can be sure that he is vulnerable to thousands of people who can frustrate or coerce him.

The approval of lunatics

Discourses, Book I, Chapter 22

And who exactly are these people that you want to be admired by? Aren't they the same people you are in the habit of calling crazy? And is this your life ambition, then - to win the approval of lunatics?

Marcus Aurelius, Meditations, Book 2, 12:

...the real nature of the things our senses experience, especially those that entice us with pleasure or frighten us with pain or are loudly trumpeted by pride. To understand those things - how stupid, contemptible, grimy, decaying and dead they are - that's what our intellectual powers are for. And to understand what those people really amount to, whose opinions and voices constitute fame.