What is offered upward is the first and the best, not the surplus a man can spare without feeling it. Firstfruits means handing over the part he most wants to keep, the early yield that proves the harvest will come, before he knows how the rest will turn out. That is the whole cost of it. To give from the top of the pile is to declare that the highest thing outranks a man's own security.
And the grain does not arrive ready. Beaten out of full ears and passed through fire, it is threshed and dried until what nourishes stands separated from the husk. Nothing worth presenting comes unrefined. A person becomes fit to offer only after he has been through the flail and the flame, stripped of what was empty in him. Bring what is first, and let it be tested before you bring it.