Put off the Old
Eph 4:20-22 You, however, did not come to know Christ that way. Surely you heard of him and were taught in him in accordance with the truth that is in Jesus. You were taught, with regard to your former way of life, to put off your old self, which is being corrupted by its deceitful desires
A person cannot come to know Christ by following the passions of their flesh. Coming to know Christ is a humiliating painful process abhorent to the flesh. Our conscience being awakened, we come through the acknowledgment and contempt for our sins with the intent of leaving our sinful lifestyle. And much of the Christian life is devoted to denying our flesh its former indulgences, lusts and passions. Such desires formerly deceived us with false promises of fulfillment but only brought corruption. For "the heart is deceitful above all things, And desperately wicked." Jer 17:9
"At one time we too were foolish, disobedient, deceived and enslaved by all kinds of passions and pleasures. We lived in malice and envy, being hated and hating one another." Titus 3:3
"Put to death, therefore, whatever belongs to your earthly nature: sexual immorality, impurity, lust, evil desires and greed, which is idolatry. Because of these, the wrath of God is coming. You used to walk in these ways, in the life you once lived." Col 3:5-7