“7 Be not deceived (refers to the fact that a Believer can definitely be deceived; Paul is speaking primarily of Believers allowing false teachers to move their Faith from the Cross to other things); God is not mocked (God, in fact, is mocked when we substitute something else in place of the Cross): for whatsoever a man sows, that shall he also reap (the Law of sowing and reaping, which will unfailingly come to pass).
8 For he who sows to his flesh shall of the flesh reap corruption (those who make something else the object of their Faith, rather than the Cross, which means they are now depending on self-will); but he who sows to the Spirit (does so by trusting exclusively in Christ and what Christ did at the Cross) shall of the Spirit reap life everlasting (God’s Prescribed Order of Victory).
9 And let us not be weary in well doing (Paul continues to speak of “sowing to the Spirit”): for in due season we shall reap (in God’s Time, our Faith in Christ and the Cross will not go unrewarded, but will bring forth exactly that which is Promised by the Lord), if we faint not. (Many start the race, but do not finish. They give up after a while, exclaiming that the “Cross” doesn’t work. Let all know and understand that we might fail, but the Cross never fails!)” Galatians 6:7-9
JSM