“I have lived in this world just long enough to look carefully the second time into things that I am the most certain of the first time.”
“If we begin with certainties, we shall end in doubts; but if we begin with doubts, and are patient in them, we shall end in certainties.”
“If a man will begin with certainties, he shall end in doubts, but if he will be content to begin with doubts, he shall end in certainties.”
“We are not certain, we are never certain. If we were we could reach some conclusions, and we could, at last, make others take us seriously.”
“We delight in one knowable thing, which comprehends all that is knowable; in one apprehensible, which draws together all that can be apprehended; in a single being that includes all, above all in the one which is itself the all.”
“He who is certain he knows the ending of things when he is only beginning them is either extremely wise or extremely foolish; no matter which is true, he is certainly an unhappy man, for he has put a knife in the heart of wonder.”