Joy is at its keenest when contrasted with sorrow, courage at its height when it follows fear, faith at its noblest when it grows from doubt.
A Curve does not exist in its full power until contrasted with a straight line.
Men are never duly touched and impressed with a conviction of their insignificance, until they have contrasted themselves with the majesty of God
Discontent arises from a knowledge of the possible, as contrasted with the actual.
I wish to speak a word for Nature, for absolute Freedom and Wildness, as contrasted with a Freedom and Culture merely civil, - to regard man as an inhabitant, or a part and parcel of Nature, rather than a member of society.
The non-commutativity of the underlying process produces an ontological complementarity. This must be contrasted to Bohr's epistemological complementarity.