The followers of Christ are to be separate from the world in principles and interests, but they are not to isolate themselves from the world. “As thou hast sent me into the world,” Christ said, “even so have I also sent them into the world” (verse 18).... We are not to withdraw ourselves from the world in order to escape persecution. We are to abide among men, that the savor of divine love may be as salt to preserve the world from corruption.
Hearts that respond to the influence of the Holy Spirit are the channels through which God’s blessings flow. Were those who serve God removed from the earth, and His Spirit withdrawn from among men, this earth would be left to desolation and destruction. Though the wicked know it not, they owe even the blessings of this life to the presence in this world of God’s people, whom they despise and oppress.... Following the instruction of Christ brings the sanctification of the Holy Spirit, and this enables men and women to reveal ... the fragrance and the saving grace of the truth....
Those who study the Word of God and day by day receive instruction from Christ bear the stamp of heaven’s principles. A high, holy influence goes forth from them. A helpful atmosphere surrounds their souls. The pure, holy, elevated principles that they follow enable them to bear a living testimony to the power of divine grace. HP 311
Many who should set their house in order, neglect to do it when they have hope that they will be raised to health in answer to prayer. Buoyed up by a false hope, they do not feel the need of giving words of exhortation and counsel to their children, parents, or friends, and it is a great misfortune. Pr 232
"I pray not that thou shouldest take them out of the world, but that thou shouldest keep them from the evil." John 17:15 (King James Version)