A. The Holy Ghost appeared at times under the form of a dove, and again under the form of tongues of fire; for, being a pure spirit without a body, He can take any form. Q. 422. Is the Holy Ghost ...

On Pentecost, Catholic Mass has a special sequence called "Veni Sancte Spiritus," or "Come Holy Spirit," said Cona. A sequence is a chant or hymn sung during a certain part of the Mass.