The greatest laws of the harvest concern the law of the fruit and the law of the root. What a person puts into something is what they will get out of it. Key verses of this message include:
2 Corinthians 9:6-8: (6) But this [I say], He which soweth sparingly shall reap also sparingly; and he which soweth bountifully shall reap also bountifully. (7) Every man according as he purposeth in his heart, [so let him give]; not grudgingly, or of necessity: for God loveth a cheerful giver. (8) And God [is] able to make all grace abound toward you; that ye, always having all sufficiency in all [things], may abound to every good work:
Galatians 6:7-9: (7) Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. (8) For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting. (9) And let us not be weary in well doing: for in due season we shall reap, if we faint not.
1 Corinthians 9:24-26: (24) Know ye not that they which run in a race run all, but one receiveth the prize? So run, that ye may obtain. (25) And every man that striveth for the mastery is temperate in all things. (26) I therefore so run, not as uncertainly; so fight I, not as one that beateth the air: