Want is a bitter and a hateful good,
Because its virtues are not understood;
Yet many things, impossible to thought,
Have been by need to full perfection brought.
The daring of the soul proceeds from thence,
Sharpness of wit, and active diligence;
Prudence at once, and fortitude it gives;
And, if in patience taken, mends our lives.

John Dryden (ed. Oxford University Press, USA, 1987)