Books are pleasant, but if by being over-studious we impair our health and spoil our good humor, two of the best things we have, let us give it over. I, for my part, am one of those who think no fruit derived from them can recompense so great a loss.
It has been just so in all my inventions. The first step is an intuition–and comes with a burst, then difficulties arise. This thing gives out and then that –‘Bugs’–as such little faults and difficulties are called — show themselves and months of anxious watching. Study and labor are requisite before commercial success — or failure — is certainly reached.