The Feast of Pentecost
The Holy Spirit descended upon the Apostles, ten days after the Ascension of our Lord Jesus Christ into heaven, as He promised them, saying, “I will send to you another Paraclete, who shall come from the Father. Wait you and remain in Jerusalem until ye received the promise of the Father.” Again He said to them, “When the Spirit of righteousness come, He will guide you in all righteousness.” Saint Peter, who was chief with our Lord Christ, said to them, “The Lord has promised to send to us the Paraclete, who is the Holy Spirit, and He will make us to understand what it is meet for us to hear and to do.”