Acts 2:2,4
Suddenly there came a sound from heaven, as of a mighty wind coming where they were sitting, alleluia; and they were all filled with the Holy Ghost, speaking the wonderful works of God. Alleluia, alleluia.
Haydock
Verse 2. A sound, &c. Perhaps this was a kind of thunder, accompanied with a great wind, which filled with terror and awe the whole company, and disposed them to receive the gift of heaven with humility and fervour. This noise appears to have been heard over a great part of the city, and to have gathered together a great crowd, who came to learn the cause. This noise and wind were symbols of the divinity. It was thus also that formerly on Mount Sinai, thunder and lightning, the dark cloud, the smoking mountain, &c. marked the majesty of God. Calmet. — Jesus Christ, our Pasch, to answer perfectly the figure, was offered on the day of the great Jewish passover; so fifty days after, for accomplishing the like figure of the law given on Mount Sinai, He sent down the Holy Ghost on the day of their Pentecost, which meaneth fifty. But our feasts, as S. Augustin remarks, besides the remembrance of benefits past, contain great mysteries also of the life to come. Ep. cxix. c. 16.
Verse 4. Began to speak divers tongues. Perhaps the apostles spoke only their own tongue, and the miracle consisted in each one’s understanding it as if they spoke it in his language. S. Greg. Nazianzen. orat. xliv. — But S. Augustin and most others, understand the text literally; though the apostles had not this gift on all occasions, nor on all subjects, and therefore sometimes stood in need of interpreters. Vide S. Aug. in Psalm xvii. Expos. 2. and Serm. 188. — The same Father observes, that the conversion of all nations to the Church, and their being united in one faith, all having one language or confession, is a perpetuation of the same miracle in the Church.