How we live is so different from how we ought to live that he who studies what ought to be done rather than what is done will learn the way to his downfall rather than to his preservation.
If you have done good, set your mind upon it so that it may be repeated over and over again. Allow yourself to be pleased by good. Accumulating good is joyful.
Demetrius: Villain, what hast thou done? Aaron: That which thou canst not undo. Chiron: Thou hast undone our mother. Aaron: Villain, I have done thy mother.
By pursuing his own interest (the individual) frequently promotes that of the society more effectually than when he really intends to promote it. I have never known much good done by those who affected to trade for the public good.
We must not stay as we are, doing always what was done last time, or we shall stick in the mud. Yet neither must we undertake a new world as catastrophic Utopians, and wreck our civilization in our hurry to mend it.
Of course we all have our limits, but how can you possibly find your boundaries unless you explore as far and as wide as you possibly can? I would rather fail in an attempt at something new and uncharted than safely succeed in a repeat of something I have done.
I had this thought a while ago,
"My darling cannot understand
What I have done, or what would do
In this blind bitter land."
And I grew weary of the sun
Advances have fallen, generally, for everything except the biggest potential bestsellers. Given all the changes, both economic and technological, SF hasn't done too badly.
Initially, terrorism was a certain mixture of politics, economics, and religion. Now, it seems that terrorism is more individual and done to avenge personal grudges. So there are two kinds of terrorism.