CCC 2623 On the day of Pentecost, the Spirit of the Promise was poured out on the disciples, gathered “together in one place.”1 While awaiting the Spirit, “all these with one accord devoted themselves to prayer.”2 The Spirit who teaches the Church and recalls for her everything that Jesus said3 was also to form her in the life of prayer.
1 Acts 2:1.
2 Acts 1:14.
3 Cf. Jn 14:26.