What a person gives to a thing with their whole heart is the only part of it that ever compounds.
Holding part of yourself back is a decision made before the work starts, and it sets the ceiling on everything after. A man who keeps ten percent in reserve believes the thing may not be worth all of him; that belief lowers his state, a lowered state makes hedged action feel reasonable, and hedged action returns the modest proof that keeps the belief alive.
Seeking God with all the heart cuts off retreat, and a person with nowhere to fall back reaches capacity a hedging person never touches. Prospering is what whole capacity does while it runs, not a payment posted afterward. Whatever a person half-does will keep paying them half, and they will spend years blaming the work instead of the reserve they kept.