These heavenly personages talked, not _to_ Jesus but _with_ him, about His approaching death, and resurrection, one of the vital things in Christ's ministry which Peter could not comprehend. Surely after this glorious vision of two heavenly beings. Death would lose much if not all its terror for Peter, James, and John. They would know that even if wicked men did kill their Master, that He would still live and still be their Lord and Savior. Death, to them, after this, would be just a "departure." They would realize that "Death hath nothing terrible in it, but what life hath made so." [Sidenote: "It is Good to be Here."] Peter by inspiration had received assurances that Jesus was indeed the Christ; now he witnessed a visible sign of his testimony. Desiring to have a monument to this outward sign, something which other eyes beside his might behold, he cried, out of the impulsiveness of his heart, "Master, it is good for us to be here, and let us make three tabernacles; one for thee, and one for Moses, and one for Elias." But suddenly, as Moses and Elias "departed," a cloud overshadowed them and a voice came _out of the cloud_ saying, "_This_ is My beloved Son hear Him!" [Sidenote: Sources of Testimony.] Peter's testimony was, by this time, made strong and his faith proved: [4] (1) By the confirmation of miracles; (2) By seeing heavenly beings; (3) By inspiration; (4) By hearing not only the testimony of these angels but the Divine testimony of God Himself! Surely his faith is now built upon the Rock, and the gates of hell cannot prevail against it! This is true; and henceforth, we may safely conclude as we follow his career, that not a shadow of doubt of the divinity of Christ's mission ever crosses Peter's mind. When we think of Peter having been in almost daily contact with the Savior of men, we may conclude that his testimony grew very slowly, but if so, like the oak tree that grows slowly to, it was all the more enduring. [Sidenote: Purity and Sincerity Essentials.] After all, Peter's experience is the experience that will come to nearly all the boys and girls who read these pages. The knowledge of truth, and the testimony of the Gospel may come gradually to most of them. The one great lesson for them to learn even in youth is, that _purity of thought_, and a _sincere heart seeking_ the Savior's _guidance daily_ will lead to a testimony of the truth of Christ's Gospel as sure and permanent as that which Peter possessed as he descended Mt. Hermon after seeing the transfiguration of Christ, and hearing the voice of God testify to His divinity. But _knowing_ that Jesus is the Savior of mankind, did not give Peter a comprehension of the Gospel plan. In this regard, he had yet much to learn. And, it may be, that his strength of character, or shall we say, his judgment, was not yet so sound as it should have been in a man whose whole life should be as firm as a rock.