Machiavelli "TO FRANCESCO VETTORI, FLORENCE, DECEMBER 10, 1513"
The necessity that chases me makes me give it, because I am becoming worn out, and I cannot remain as I am for a long time without becoming despised because of poverty, besides the desire I have that these Medici lords begin to make use of me even if they should begin by making me roll a stone. For if I should not then win them over to me, I should complain of myself; and through this thing, if it were read, one would see that I have neither slept through nor played away the fifteen years I have been at the study of the art of the state.
I know the proverb "a rolling stone (gathers no moss)".