Great ideas originate in the muscles.
Genius is 1 per cent inspiration and 99 per cent perspiration.
Everything comes to him who hustles while he waits.
Being busy does not always mean real work. The object of all work is production or accomplishment and to either of these ends there must be forethought, system, planning, intelligence and honest purpose, as well as perspiration.
Anything that won’t sell I don’t want to invent, because anything that won’t sell hasn’t reached the acme of success. Its sale is proof of its utility, and utility is success.