To know what constitutes purity of mind, soul, and body is an important part of education.
When the character is lacking in purity, when sin has become a part of the character, it has a bewitching power that is equal to the intoxicating glass of liquor. The power of self-control and reason is overborne by practices that defile the whole being; and if these sinful practices are continued, the brain is enfeebled and diseased, and loses its balance. Such ones are a curse to themselves and to all who have any connection with them....
Bad habits are more easily formed than good habits, and the bad habits are given up with more difficulty. The natural depravity of the heart accounts for this well-known fact—that it takes far less labor to demoralize the youth, to corrupt their ideas of moral and religious character, than to engraft upon their character the enduring, pure, and uncorrupted habits of righteousness and truth. Self-indulgence, love of pleasure, enmity, pride, self-esteem, envy, jealousy, will grow spontaneously, without example and teaching. In our present fallen state all that is needed is to give up the mind and character to its natural tendencies. In the natural world, give up a field to itself and you will see it covered with briers and thorns; but if it yields precious grain or beautiful flowers, care and unremitting labor must be applied.
Now we present before you the necessity of constant resistance to evil. All heaven is interested in men and women whom God has valued so much as to give His beloved Son to die to redeem them. No other creature that God has made is capable of such improvement, such refinement, such nobility as man. Then when men become blunted by their own debasing passions, sunken in vice, what a specimen for God to look upon! Man cannot conceive what he may be and what he may become. Through the grace of Christ he is capable of constant mental progress. Let the light of truth shine into his mind and the love of God be shed abroad in his heart and he may, through the grace Christ has died to impart to him, be a man of power—a child of earth but an heir of immortality.16In Heavenly Places, 195. Mar 229
As they met together after the ascension they were eager to present their requests to the Father in the name of Jesus. In solemn awe they bowed in prayer, repeating the assurance, “Whatsoever ye shall ask the Father in My name, He will give it you. Hitherto have ye asked nothing in My name: ask, and ye shall receive, that your joy may be full.” John 16:23-24. They extended the hand of faith higher and higher with the mighty argument, “It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us.” Romans 8:34. And Pentecost brought them the presence of the Comforter, of whom Christ had said, He “shall be in you.” And He had further said, “It is expedient for you that I go away: for if I go not away, the Comforter will not come unto you; but if I depart, I will send Him unto you.” John 14:17; 16:7. Henceforth through the Spirit, Christ was to abide continually in the hearts of His children. Their union with Him was closer than when He was personally with them. The light, and love, and power of the indwelling Christ shone out through them, so that men, beholding, “marveled; and they took knowledge of them, that they had been with Jesus.” Acts 4:13. SC 74
Keep thyself pure. 1 Timothy 5:22. KJV