S. Austin Allibone, comp. Prose Quotations from Socrates to Macaulay. 1880.
I must confess, there is something in the changeableness and inconstancy of human nature that very often both dejects and terrifies me. Whatever I am at present, I tremble to think what I may be. While I find this principle, how can I assure myself that I shall be always true to my God, my friend, or myself? In short, without constancy there is neither love, friendship, nor virtue in the world.