The Lord stated, if anyone does not despise his own life, he cannot be My disciple (Luke 14:26).
The esteemed Barsonophius elucidates these words: 'How does one deny oneself? It is achieved solely by abandoning natural desires and following the Lord. Thus the Lord refers to the natural, and not to the unnatural; for if one only renounces the unnatural, he has not truly forsaken anything that is his own for God's sake, as the unnatural does not pertain to him. However, one who has forsaken what is natural will echo the lament of the Apostle Peter: “We have left everything, and we follow You; what then will there be for us?” (Matthew 19:27-29) and will receive the reassuring voice of the Lord along with the promise of eternal life (Matthew 19:27, 29).
What did Peter abandon, given his lack of wealth, and what did he take pride in, if not the relinquishment of his natural cravings? For unless a person dies to the cares of the flesh and lives by the Spirit, he cannot attain resurrection in the soul. Just as a dead person has no natural desires, so too does one who is spiritually dead to the flesh possess none. If you are indeed dead to the flesh, how can any natural impulses thrive within you? If you have not yet attained a mature spiritual mindset and still possess a childish understanding, then humbly submit to your teacher—allow him to correct you with kindness (Ps. 140:5) and refrain from acting without guidance (Sire. 32:21), even if your actions appear to have merit; for the light of demons will eventually transform into darkness (Reply 59). The same can be said for the deceptive light of fallen human nature. Pursuing this light and nurturing it within oneself leads to profound darkness in the soul, completely distancing it from Christ. Whoever is estranged from Christianity is estranged from God: anyone who denies the Son does not have the Father (1 John 2:23) and is without faith.