Doctrine and Covenants 50:40-46
40 Behold, ye are little children and ye cannot bear all things now; ye must grow in grace and in the knowledge of the truth.
41 Fear not, little children, for you are mine, and I have overcome the world, and you are of them that my Father hath given me;
42 And none of them that my Father hath given me shall be lost.
43 And the Father and I are one. I am in the Father and the Father in me; and inasmuch as ye have received me, ye are in me and I in you.
44 Wherefore, I am in your midst, and I am the good shepherd, and the stone of Israel. He that buildeth upon this rock shall never fall.
45 And the day cometh that you shall hear my voice and see me, and know that I am.
46 Watch, therefore, that ye may be ready. Even so. Amen.