Well,sin enter us through 3 ways ,satan targets us like sitting ducks ,since the flesh is the easiest way for us to fall into sin ,as Eve was deceived.
1 John 2:15 Do not love the world or the things in the world. The love of the Father is not in those who love the world; 16 for all that is in the world—the desire of the flesh, the desire of the eyes, the pride in riches—comes not from the Father but from the world. 17 And the world and its desire are passing away, but those who do the will of God live forever.
James 4:4 Adulterers! Do you not know that friendship with the world is enmity with God? Therefore whoever wishes to be a friend of the world becomes an enemy of God. 5 Or do you suppose that it is for nothing that the scripture says, “God yearns jealously for the spirit that he has made to dwell in us”? 6 But he gives all the more grace; therefore it says,
“God opposes the proud,
but gives grace to the humble.”
7 Submit yourselves therefore to God. Resist the devil, and he will flee from you. 8 Draw near to God, and he will draw near to you. Cleanse your hands, you sinners, and purify your hearts, you double-minded. 9 Lament and mourn and weep. Let your laughter be turned into mourning and your joy into dejection. 10 Humble yourselves before the Lord, and he will exalt you.
1 Thessalonians 4:3 For this is the will of God, your sanctification: that you abstain from fornication; 4 that each one of you know how to control your own body in holiness and honor, 5 not with lustful passion, like the Gentiles who do not know God; 6 that no one wrong or exploit a brother or sister in this matter, because the Lord is an avenger in all these things, just as we have already told you beforehand and solemnly warned you. 7 For God did not call us to impurity but in holiness. 8 Therefore whoever rejects this rejects not human authority but God, who also gives his Holy Spirit to you.