priceless.

the look in a little boy's eyes when the greatness and holiness of God is explained via isaiah 6.

In the year that King Uzziah died, I saw the Lord sitting on a throne, high and lifted up, and the train of His robe filled the temple.
Above it stood seraphim; each one had six wings: with two he covered his face, with two he covered his feet, and with two he flew.
And one cried to another and said:

"Holy, holy, holy is the Lord of hosts;
The whole earth is full of His glory!"