Colossians 3: 5 Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry.
We will need the abiding and the empowering presence of Christ to fend off multiple incursions against our souls, which occur externally as well as internally, the internal invasions being the more dangerous of the two.
Knowing the scriptures does not keep any person from falling, what it does is to give folks an active reference point to distinguish between right and wrong. But knowing a whole lot of scripture, in and of itself does not keep a person from falling.
The motive power to do right comes from a Person, not from a written document, and thus it becomes even more imperative that we ask God for grace to help us in times of need. Know and understand this for sure, when Jesus quoted scripture in the desert of temptation, He became even more hungry after He had quoted them.
John 15:4 Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me. 5 I am the vine, ye are the branches: He that abides in me, and I in him, the same brings forth much fruit: for without me ye can do nothing.
May The Lord add His blessing to the study of His word. God bless!