You shall receive a witness – Holy Spirit

President Brigham Young, quoted by John A. Widtsoe The Lord has said, go into the waters of baptism and be baptized for the remission of your sins, and you shall receive a witness that I am telling you the truth. How? . . . You will feel kind to your children, to your brothers and sisters, to your parents and neighbors, and to all around you; you will feel a glow, as of fire, burning within you; and if you open your mouths to talk you will declare ideas which you did not formerly think of; they will flow into your mind, even such as you have not thought of for years. The Scriptures will be opened to you, and you will see how clear and reasonable everything is which this or that Elder teaches you. Your hearts will be comforted, you can lie down and sleep in peace, and wake up with feelings as pleasant as the breezes of summer. This is a witness to you. (In Tabernacle, Feb. 17, 1856, JD3:211) DBY:331