I find that, much of the time, a thing is best defined by its opposite.

"I sit beside the fire and think / Of all that I have seen..."

"I find your lack of faith disturbing."

"Seek and ye shall find."

"I find that if I just sit down and think... a solution presents itself!"

"Then he knew not if he awoke, or if it were a change in his dream; but the chamber became dark about him, and he lay there thinking of her, till, as it seemed, day began to dawn, and there was some little stir in the world without, and the new wind moved the casement. And again the door opened, and someone entered as before; and this also was a woman: green-clad she was and barefoot, yet he knew at once that it was not his love that was dead, but the damsel of the ale-house of Bourton, whom he had last seen by the wantways of the Wood Perilous, and he thought her wondrous fair, fairer than he had deemed."