Instant obedience is the only kind of obedience there is; delayed obedience is disobedience period. Every time God calls us to any duty, He is offering to make a covenant with us; doing the duty is our part, and He will do His part in special blessing.
The best period we can obey is to obey “in the selfsame day,” as Abraham did. To be sure, we often postpone a duty and then later on do it on our convince time frame. It is better to do this than not to do it at all. But it is then, at the best, only a crippled, disfigured, half-way sort of duty-doing; and a postponed duty never can bring the full blessing that God intended, and that that it would have brought whenever done at the most punctual conceivable minute
It is a pity to loot ourselves, alongside victimizing God and others, by tarrying. "In the equivalent day" is the Genesis method for saying, "Do it now.
Dutifulness is the product of confidence; persistence, the blossom on the organic product.