Hope is the boy, a blind, headlong, pleasant fellow, good to chase swallows with the salt; Faith is the grave, experienced, yet smiling man. Hope lives on ignorance; open-eyed Faith is built upon a knowledge of our life, of the tyranny of circumstance and the frailty of human resolution. Hope looks for unqualified success; but Faith counts certainly on failure, and takes honourable defeat to be a form of victory. Hope is a kind old pagan; but Faith grew up in Christian days, and early learnt humility.
In the one temper, a man is indignant that he cannot spring up in a clap to heights of elegance and virtue; in the other, out of a sense of his infirmities, he is filled with confidence because a year has come and gone, and he has still preserved some rags of honour. In the first, he expects an angel for a wife; in the last, he knows that she is like himself — erring, thoughtless, and untrue; but like himself also, filled with a struggling radiancy of better things, and adorned with ineffective qualities.

Robert Louis Stevenson (1850-1894) Scottish essayist, novelist, poet

Essay (1881), “Virginibus Puerisque, Part 2”
    (Source)

First published in Virginibus Puerisque and Other Papers, ch. 1, part 2 (1881).