‘What God has made clean, you are not to call profane.’

As I began to speak, the Holy Spirit fell upon them
as it had upon us at the beginning,
and I remembered the word of the Lord, how he had said,
‘John baptized with water
but you will be baptized with the Holy Spirit.’
If then God gave them the same gift he gave to us
when we came to believe in the Lord Jesus Christ,
who was I to be able to hinder God?”
When they heard this,
they stopped objecting and glorified God, saying,
“God has then granted life-giving repentance to the Gentiles too.”

- Acts 11:1-18

Faced with God's fascinating and mysterious presence, man discovers his own insignificance. Before the burning bush, Moses takes off his sandals and veils his face in the presence of God's holiness. Before the glory of the thrice-holy God, Isaiah cries out: "Woe is me! I am lost; for I am a man of unclean lips." Before the divine signs wrought by Jesus, Peter exclaims: "Depart from me, for I am a sinful man, O Lord." But because God is holy, he can forgive the man who realizes that he is a sinner before him: "I will not execute my fierce anger. . . for I am God and not man, the Holy One in your midst." The apostle John says likewise: "We shall. . . reassure our hearts before him whenever our hearts condemn us; for God is greater than our hearts, and he knows everything."

- CCC 208