1st Peter 1:13 Wherefore gird up the loins of your mind, be sober, and hope to the end for the grace that is to be brought unto you at the revelation of Jesus Christ; 14 As obedient children, not fashioning yourselves according to the former lusts in your ignorance: 15 But as he which hath called you is holy, so be ye holy in all manner of conversation; 16 Because it is written, Be ye holy; for I am holy.
[Patriarchs And Prophets pp. 459>460] It was when the Israelites were in a condition of outward ease and security that they were led into sin. They failed to keep God ever before them, they neglected prayer and cherished a spirit of self-confidence. Ease and self-indulgence left the citadel of the soul unguarded, and debasing thoughts found entrance. It was the traitors within the walls that overthrew the strongholds of principle and betrayed Israel into the power of Satan. It is thus that Satan still seeks to compass the ruin of the soul. A long preparatory process, unknown to the world, goes on in the heart before the Christian commits open sin. The mind does not come down at once from purity and holiness to depravity, corruption, and crime. It takes time to degrade those formed in the image of God to the brutal or the satanic. By beholding we become changed. By the indulgence of impure thoughts man can so educate his mind that sin which he once loathed will become pleasant to him.
“Keep thy heart with all diligence,” is the counsel of the wise man; “for out of it are the issues of life.” Proverbs 4:23. As man “thinketh in his heart, so is he.” Proverbs 23:7. The heart must be renewed by divine grace, or it will be in vain to seek for purity of life. He who attempts to build up a noble, virtuous character independent of the grace of Christ is building his house upon the shifting sand. In the fierce storms of temptation it will surely be overthrown. David's prayer should be the petition of every soul: “Create in me a clean heart, O God; and renew a right spirit within me.” Psalm 51:10. And having become partakers of the heavenly gift, we are to go on unto perfection, being “kept by the power of God through faith.” 1 Peter 1:5.
Yet we have a work to do to resist temptation. Those who would not fall a prey to Satan's devices must guard well the avenues of the soul; they must avoid reading, seeing, or hearing that which will suggest impure thoughts. The mind should not be left to wander at random upon every subject that the adversary of souls may suggest. “Girding up the loins of your mind,” says the apostle Peter, “Be sober, ... not fashioning yourselves according to your former lusts in ... your ignorance: but like as He which called you is holy, be ye yourselves also holy in all manner of living.” 1 Peter 1:13-15, R.V. Says Paul, “Whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.” Philippians 4:8. This will require earnest prayer and unceasing watchfulness. We must be aided by the abiding influence of the Holy Spirit, which will attract the mind upward, and habituate it to dwell on pure and holy things. And we must give diligent study to the word of God. “Wherewithal shall a young man cleanse his way? by taking heed thereto according to Thy word.” “Thy word,” says the psalmist, “have I hid in mine heart, that I might not sin against Thee.” Psalm 119:9, 11.
Philippians 4:8 Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.
May The Lord add His blessing to the study and practice of His every word. God bless!