Uzzah was powerful when he followed Yahweh. When he entered the temple to burn incense like a priest, God made him a leper. Lepers could not properly worship Yahweh because they were always unclean. (See: [[rc://en/tw/dict/bible/kt/temple]] and [[rc://en/tw/dict/bible/kt/priest]] and [[rc://en/tw/dict/bible/kt/clean]])