That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts. Ephesians 4:22. YRP 53.1
John says, “The light”—Christ—“shineth in darkness,” that is, in the world, “and the darkness comprehended it not.... But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God” (John 1:5-13). The reason why the unbelieving world is not saved is that they do not choose to be enlightened. The old nature, born of blood and the will of the flesh, cannot inherit the kingdom of God. The old ways, the hereditary tendencies, the former habits, must be given up; for grace is not inherited. The new birth consists in having new motives, new tastes, new tendencies. YRP 53.2
Those who are begotten unto a new life by the Holy Spirit have become partakers of the divine nature, and in all their habits and practices, they will give evidence of their relationship to Christ. When men who claim to be Christians retain all their natural defects of character and disposition, in what does their position differ from that of the worldling? They do not appreciate the truth as a sanctifier, a refiner. They have not been born again.... YRP 53.3
Let none feel that their way needs no changing. Those who decide thus are not fitted to engage in the work of God, for they will not feel the necessity of pressing constantly toward a higher standard, making continual improvement. None can walk safely unless they are distrustful of self, and are constantly looking to the work of God, studying it with willing heart to see their own errors, and to learn the will of Christ, and praying that it may be done in and by and through them. They show that their confidence is not in themselves, but in Christ. They hold the truth as a sacred treasure, able to sanctify and refine, and they are constantly seeking to bring their words and ways into harmony with its principles. They fear and tremble lest something savoring of self shall be idolized, and thus their defects be reproduced in others who confide in them. They are always seeking to subdue self, to put away everything that savors of it, and to supply the place with the meekness and lowliness of Christ. They are looking unto Jesus, growing up into Him, gathering from Him light and grace, that they may diffuse the same to others.—The Review and Herald, April 12, 1892. YRP 53.4