by St. John Chrysostom
But why did the Holy Ghost come to them, not while Christ was present, nor even immediately after his departure, but, whereas Christ ascended on the fortieth day, the Spirit descended "when the day of Pentecost," that is, the fiftieth, "was fully come?" (Acts ii. 1.) And how was it, if the Spirit had not yet come, that He said, "Receive ye the Holy Ghost?" (John xx. 22.) In order to render them capable and meet for the reception of Him. For if Daniel fainted at the sight of an Angel (Dan. viii. 17), much more would these when about to receive so great a grace. Either this then is to be said, or else that Christ spoke of what was to come, as if come already; as when He said, "Tread ye upon serpents and scorpions, and over all the power of the devil." (Luke x. 19.) But why had the Holy Ghost not yet come? It was fit that they should first be brought to have a longing desire for that event, and so receive the grace. For this reason Christ Himself departed, and then the Spirit descended. For had He Himself been there, they would not have expected the Spirit so earnestly as they did. On this account neither did He come immediately after Christ's Ascension, but after eight or nine days. It is the same with us also; for our desires towards God are then most raised, when we stand in need.
by Fr. Vladimir Berzonsky
from The Word, May 1971
Pentecost means graduation, in a way. It is the time when the earthly life of Jesus Christ is fulfilled, and our life in Christ begins. We have honored his life of devoted service to fulfilling the will of the Father in heaven: now we should know and see clearly what God wants from our lives. It is our turn.
What do we respond; that we are too weak or too few, that we need to learn more, or that the forces of evil are too great to overcome? Remember Jesus’ words: “Be brave, for I have conquered the world.”(John 16:33). The victory is already won; we have only to complete it. Do we say we cannot do anything ourselves? Do we now claim humility and weakness? “The Advocate, the Holy Spirit, whom the Father will send in my name, will teach you every thing and remind you of all I have said to you.” (John 14:25). It means that you are never alone; not only is that said for your comfort, but for the means by which you personally can do the will of God in a way that nobody else but you is able.
Commentary of St. John Chrysostom on the Acts of the Apostles
And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven." (Acts 2:1-2)
DOST thou perceive the type? What is this Pentecost? The time when the sickle was to be put to the harvest, and the ingathering was made. See now the reality, when the time was come to put in the sickle of the word: for here, as the sickle, keen-edged, came the Spirit down. For hear the words of Christ: "Lift up your eyes," He said, "and look on the fields, for they are white already to harvest." (John iv. 35.) And again, "The harvest truly is great, but the laborers are few." (Matt. ix. 38.) But as the first-fruits of this harvest, He himself took [our nature], and bore it up on high. Himself first put in the sickle. Therefore also He calls the Word the Seed. "When," it says, "the day of Pentecost was fully come" (Luke viii. 5, 11): that is, when at the Pentecost, while about it, in short. For it was essential that the present events likewise should take place during the feast, that those who had witnessed the crucifixion of Christ, might also behold these.
"And suddenly there came a sound from heaven." (v. 2.) Why did this not come to pass without sensible tokens? For this reason. If even when the fact was such, men said, "They are full of new wine," what would they not have said, had it been otherwise? And it is not merely, "there came a sound," but, "from heaven." And the suddenness also startled them, and brought all together to the spot. "As of a rushing mighty wind:" this betokens the exceeding vehemence of the Spirit. "And it filled all the house:" insomuch that those present both believed, and in this manner were shown to be worthy.