Great enterprises require a sustained effort over a long period of time. They cannot be pursued in fits and starts with intermittent bursts of energy; and they demand a confluence of factors that only coalesce on rare occasions. There must exist the ability and talent to conceive the project; there must be intense initiative and endurance to carry it through to completion; and, as a practical matter, the creator must have the leisure and financial ability to sponsor his labors. If any of these requirements are wanting, there will be no progress.
