“Most of the world’s great men have achieved their true life work, not in the course of their needful occupations, but in their spare time.
A tired-out rail splitter, crouched over his tattered books by candlelight at the day’s end, preparing for his future, instead of snoring or sky-larking like his co-laborers—Lincoln cut out his path to later immortality in his spare time.
An underpaid and overworked telegraph clerk stole hours from sleep, or from play, at night, trying to crystallize into realities certain fantastic dreams in which he had faith. Today, the whole world is benefiting by what Edison did—in his spare time.
An instructor in an obscure college varied the drudgery he hated, by spending his evenings and holidays in tinkering with a queer device of his at which his fellow teachers laughed. But he invented the telephone—in his spare time.
You, too, have spare time. Why not use it in this kind of research which pays wonderful dividends in this life and the next?”
—“Research Unlimited,” Mr. Jones, Meet the Master: Sermons and Prayers of Peter Marshall.