Pope Francis reminds us that Christ taught us to go out to others, to reach out and to share with everyone the good news that God loves us. The gift of the Transfiguration gives us the grace and strength necessary to labor so as to bring the good news to the whole world. God loves you so tell everyone you meet that in Jesus God loves them too.
Saint Augustine puts it like this...
Hear and listen, thou covetous one: the Apostle explains to thee in another place more clearly this that he said, “Let no man seek his own, but another’s.” He says of himself, “Not seeking mine own profit, but the profit of many, that they may be saved.”23 This Peter understood not yet when he desired to live on the mount with Christ. He was reserving this for thee, Peter, after death. But now He saith Himself, “Come down, to labour in the earth; in the earth to serve, to be despised, and crucified in the earth. The Life came down, that He might be slain; the Bread came down, that He might hunger; the Way came down, that life might be wearied in the way; the Fountain came down, that He might thirst; and dost thou refuse to labour? ‘Seek not thine own.’ Have charity, preach the truth; so shall thou come to eternity, where thou shalt find security.”
And after six days Jesus taketh unto him Peter and James, and John his brother, and bringeth them up into a high mountain apart:
2 And he was transfigured before them. And his face did shine as the sun: and his garments became white as snow.
3 And behold there appeared to them Moses and Elias talking with him.
4 And Peter answering, said to Jesus: Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles, one for thee, and one for Moses, and one for Elias.
5 And as he was yet speaking, behold a bright cloud overshadowed them. And lo, a voice out of the cloud, saying: This is my beloved Son, in whom I am well pleased: hear ye him.
6 And the disciples hearing, fell upon their face, and were very much afraid.
7 And Jesus came and touched them: and said to them, Arise, and fear not.
8 And they lifting up their eyes saw no one but only Jesus.
9 And as they came down from the mountain, Jesus charged them, saying: Tell the vision to no man, till the Son of man be risen from the dead.