[H]ere we bless your simplicity but do not envy your folly. - Thucydides

However well off a man may be in his private life, he will still be involved in the general ruin if his country is destroyed; whereas, so long as the state itself is secure, individuals have a much greater chance of recovering from their private misfortunes.

(Pericles:) For we have a peculiar power of thinking before we act and of acting too,whereas other men are courageous from ignorance but hesitate upon reflection. And they are surely to be esteemed the bravest spirits who, having the clearest sense both of the pains and pleasures of life, do not on that account shrink from danger.

In doing good, again, we are unlike others; we make our friends by conferring, not by receiving favours. Now he who confers a favour is the firmer friend, because he would fain by kindness keep alive the memory of an obligation; but the recipient is colder in his feelings, because he knows that in requiting another's generosity he will not be winning gratitude but only paying a debt.

We alone do good to our neighbours not upon a calculation of interest, but in the confidence of freedom and in a frank and fearless spirit.

(Book 2 Chapter 40.3-5)

Friendship or enmity is everywhere an affair of time and circumstance