Young people, stay in condition to respond to inspiration.I have come to know also that a fundamental purpose of the Word of Wisdom has to do with revelation.From the time you are very little we teach you to avoid tea, coffee, liquor, tobacco, narcotics, and anything else that disturbs your health.And you know that we get very worried when we find one of you tampering with those things.If someone “under the influence” can hardly listen to plain talk, how can they respond to spiritual promptings that touch their most delicate feelings?As valuable as the Word of Wisdom is as a law of health, it may be much more valuable to you spiritually than it is physically.Pres. Boyd K. Packer, Prayers and Answers, Nov. 1979
Bringing into your body substances forbidden by the Lord in the Word of Wisdom will prevent you from feeling and recognizing the promptings of the Holy Ghost.
Elder Joseph B. Wirthlin, “Growing into the Priesthood,” Ensign, Nov 1999, 38
The physical blessings of health and strength that are promised through obedience to the Word of Wisdom are now well-known and well documented. In addition, the spiritual blessings of “wisdom and great treasures of knowledge, even hidden treasures,” come to those who keep their bodies free from addictive substances. When we obey the Word of Wisdom, windows of personal revelation are opened to us and our souls are filled with divine light and truth. If we keep our bodies undefiled, the Holy Ghost “shall come upon [us] and … dwell in [our] heart[s]” and teach us “the peaceable things of immortal glory.”
Elder Joseph B. Wirthlin, “Windows of Light and Truth,” Ensign, Nov 1995, 75–78
Keep the Word of Wisdom. Seek worthy companions. Attend church faithfully. Never fail daily to seek for help through prayer. And I promise you that the way will be easier and you shall have a composure of mind and a confident attitude toward life and the future. You shall be warned of dangers and shall be guided through the whisperings of the Holy Spirit.I bear witness that this revelation is a powerful protection to all members of the Church, particularly to you, the youth of the Church, as you face a life full of so many troubles and danger and uncertainties.Pres. Boyd K. Packer, The Word of Wisdom: The Principle and the Promises