Leisure, is Time for doing something useful; this Leisure the diligent Man will obtain, but the lazy Man never
 Benjamin Franklin, The Autobiography of Benjamin Franklin (1791). copy citation

Context

“Methinks I hear some of you say, Must a Man afford himself no Leisure? I will tell thee, my friend, what Poor Richard says, Employ thy Time well, if thou meanest to gain Leisure; and, since thou art not sure of a Minute, throw not away an Hour. Leisure, is Time for doing something useful; this Leisure the diligent Man will obtain, but the lazy Man never; so that, as Poor Richard says, A Life of Leisure and a Life of Laziness are two things. Keep thy Shop, and thy Shop will keep thee; and again, If you would have your business done, go; if not, send.” source