Sanctification includes the entire being—spirit, soul, and body (see 1 Thessalonians 5:23). Christians are called to present their bodies “a living sacrifice, holy, acceptable to God” (Romans 12:1). Every practice that weakens physical or mental strength unfits us for the service of our Creator. Those who love God with all their heart will constantly try to bring every power of their being into harmony with the laws that make them better able to do His will. They will not weaken or defile the offering they present to their heavenly Father by indulging their appetites or passions. LF 194.5
Every sinful practice tends to numb and deaden the mental and spiritual understanding; the Word or Spirit of God can make only a feeble impression on the heart. “Let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God” (2 Corinthians 7:1). LF 194.6
How many professed Christians are degrading their godlike manhood or womanhood by gluttony, by wine drinking, by forbidden pleasure! And the church too often encourages the evil, to fill her treasury when love for Christ is too feeble to do it. If Jesus were to enter the churches of today and see the feasting that goes on there in the name of religion, would He not drive out those who desecrate His house that way, as He banished the moneychangers from the temple? LF 195.1
“Do you not know that your body is the temple of the Holy Spirit who is in you, whom you have from God, and you are not your own? For you were bought at a price; therefore glorify God in your body and in your spirit, which are God's” (1 Corinthians 6:19, 20). Christians whose bodies are the temple of the Holy Spirit will not be enslaved by an evil habit. Their powers belong to Christ. Their property is the Lord's. How could they squander this treasure that He has entrusted to them? LF 195.2
Every year professed Christians spend an immense amount of money on harmful pleasures. They rob God in tithes and offerings, while they consume on the altar of destroying lust more than they give to relieve the poor or support the gospel. If all who claim Christ's name were truly sanctified, they would give their money generously into the Lord's treasury instead of spending it for needless and hurtful indulgences. Christians would set an example of temperance and self-sacrifice. Then they would be the light of the world. LF 195.3
“The lust of the flesh, the lust of the eyes, and the pride of life” (1 John 2:16) control most people. But Christ's followers have a holier calling. “Come out from among them and be separate, says the Lord. Do not touch what is unclean.” To those who comply with the conditions, God promises, “‘I will receive you.’ ‘I will be a Father to you, and you shall be my sons and daughters, says the LORD Almighty’” (2 Corinthians 6:17, 18). LF 195.4