Alma 15:9-11

9 And he said: Yea, I believe according to thy words.

10 And then Alma cried unto the Lord, saying: O Lord our God, have mercy on this man, and heal him according to his faith which is in Christ.

11 And when Alma had said these words, Zeezrom leaped upon his feet, and began to walk; and this was done to the great astonishment of all the people; and the knowledge of this went forth throughout all the land of Sidom.

Zeezrom's entire future (temporal and spiritual) was hinged on the words 'I believe.'

Verse 11 is so packed, so full, I feel that anything I write in addition would detract from it.