John 11:15

15. I am glad Jesus, here, seems to rejoice at the opportunity for the miracle. But was not miracle always in his power? Doubtless in his power always; but not always accordantly with the divine will. He who moved by the Father’s will, and timed his steps by the divine clock, (see notes on John 11:7; John 11:9-10,) rejoiced when the hour struck for some great work confirmatory of his mission.

Ye may believe John uses the word believe for the various degrees and stages of faith. See note on John 2:11. This great work would stand in memory and on record, one of the pillars for faith to repose upon.