In the great chain of causes and effects, no single fact can be considered in isolation.
You must know the big ideas in the big disciplines and use them routinely — all of them, not just a few.
The most dangerous worldview is the worldview of those who have not viewed the world.
A good ornithologist should be able to distinguish birds by their air as well as by their colours and shape.
When I hear fine music I am afraid I do not enough attend to it. I cannot help stopping and filling my mind with the sweetness of the sounds.
These circumstances, trivial as they may seem, have their importance; since without them we could never have come to any certainty.