It is hardly surprising that children should enthusiastically start their education at an early age with the Absolute Knowledge of computer science; while they are unable to read, for reading demands making judgments at every line. Conversation is almost dead, and soon so too will be those who knew how to speak.
— Guy Debord

Few can be induced to labor exclusively for posterity; and none will do it enthusiastically. Posterity has done nothing for us; and theorize on it as we may, practically we shall do very little for it, unless we are made to think we are at the same time doing something for ourselves.
— Abraham Lincoln

This I do know beyond any reasonable doubt. Regardless of what you are doing, if you pump long enough, hard enough and enthusiastically enough, sooner or later the effort will bring forth the reward.
— Zig Ziglar

We rely more on enthusiasm than actual skill. Whatever you do, do it enthusiastically and people will like it more.
— Chris Martin

Whatever you vividly imagine, ardently desire, sincerely believe, and enthusiastically act upon... must inevitably come to pass!
— Paul J. Meyer