CCC 718

John is "Elijah (who) must come."⁹² Mt 17:10-13; cf. Lk 1:78. The fire of the Spirit dwells in him and makes him the forerunner of the coming Lord. In John, the precursor, the Holy Spirit completes the work of "[making] ready a people prepared for the Lord."⁹³ Lk 1:17.