“He knows how what is distant lies in what is near. He knows where the wind proceeds from. He knows how what is minute becomes manifested. Such a one, we may be sure, will enter into virtue.”

Source: The Yiddish Policemen’s Union (2007), Chapter 46

Fragments of Markham's notes
The Nemesis of Faith (1849)
Context: It is alike self-contradictory and contrary to experience, that a man of two goods should choose the lesser, knowing it at the time to be the lesser. Observe, I say, at the time of action. We are complex, and therefore, in our natural state, inconsistent, beings, and the opinion of this hour need not be the opinion of the next. It may be different before the temptation appear; it may return to be different after the temptation is passed; the nearness or distance of objects may alter their relative magnitude, or appetite or passion may obscure the reflecting power, and give a temporary impulsive force to a particular side of our nature. But, uniformly, given a particular condition of a man's nature, and given a number of possible courses, his action is as necessarily determined into the course best corresponding to that condition, as a bar of steel suspended between two magnets is determined towards the most powerful. It may go reluctantly, for it will still feel the attraction of the weaker magnet, but it will still obey the strongest, and must obey. What we call knowing a man's character, is knowing how he will act in such and such conditions. The better we know him the more surely we can prophesy. If we know him perfectly, we are certain.

Source: Aphorisms and Reflections (1901), p. 136

This Business of Living (1935-1950)

Source: The Iron Man (1968), Ch. 1 : The Coming of the Iron Man
Context: The Iron Man came to the top of the cliff. How far had he walked? Nobody knows. Where did he come from? Nobody knows. How was he made? Nobody knows. Taller than a house the Iron Man stood at the top of the cliff, at the very brink, in the darkness.

Paris Review (Summer 1966)
Context: Success, instead of giving freedom of choice, becomes a way of life. There's no country I've been to where people, when you come into a room and sit down with them, so often ask you, "What do you do?" And, being American, many's the time I've almost asked that question, then realized it's good for my soul not to know. For a while! Just to let the evening wear on and see what I think of this person without knowing what he does and how successful he is, or what a failure. We're ranking everybody every minute of the day.

"Jim Bludso", Pike County Ballads http://en.wikipedia.org/wiki/Pike_County_Ballads, (1871).

Letter LXXI: On the supreme good, line 3
Alternate translation: If one does not know to which port one is sailing, no wind is favorable. (translator unknown).
Epistulae Morales ad Lucilium (Moral Letters to Lucilius)
Context: Our plans miscarry because they have no aim. When a man does not know what harbour he is making for, no wind is the right wind.