8 For he that soweth in his flesh, of the flesh he shall reap corruption; but he that soweth in the Spirit, of the Spirit he shall reap everlasting life.
9 And doing good fail we not [Forsooth we doing good, fail not]; for in his time we shall reap, not failing.”
Here Paul strongly reminds his readers in Galatia that circumcision of the flesh is not the proper means to everlasting life. They are sowing “in the flesh” rather than “in the Spirit.” They are seeking to obey the Law of Moses primarily to avoid the cross of Christ, i.e. crucifixion. They have forgotten they can not scorn God; they can not make their own way to heaven. They must take up Christ’s way and so “reap everlasting life” as they “soweth in the Spirit.”
“12For whoever will please in the flesh, these constrain you to be circumcised, only that they suffer not the persecution of Christ’s cross.
13 For neither they that be circumcised keep the law; but they will that ye be circumcised, that they have glory in your flesh [but they will you to be circumcised, that they glory in your flesh].
14 But far be it from me to have glory [Forsooth be it far to me to glory], but in the cross of our Lord Jesus Christ, by whom the world is crucified to me, and I to the world.
15 For in Jesus Christ neither circumcision is any thing worth, nor prepuce, but a new creature.”
Paul says, glory not in your flesh; glory only “in the cross of our Lord Jesus Christ.” Remember, what matters — what has worth — is being made “a new creature.” All the rest is corruption.