Habit is a second nature thta destroys the first. But what is nature? Why is habit not natural? I am very much afraid that nature itself is only a fi… - Blaise Pascal

But what is nature? For is custom not natural? I am much afraid that nature is itself only a first custom, as custom is a second nature.

Nothing is more common than good things: the point in question is only to discriminate them; and it is certain that they are all natural and within our reach and even known to all mankind.

When I consider the brief span of my life absorbed into the eternity which comes before and after — as the remembrance of a guest that tarrieth but a day — the small space I occupy and which I see swallowed up in the infinite immensity of spaces of which I know nothing and which know nothing of me, I take fright and am amazed to see myself here rather than there, now rather than then.

Knowledge is like a sphere, the greater its volume, the larger its contact with the unknown.