The calendrical advent of Whitsunday and Trinity tide inevitably directs the mind toward the epoch of the Holy Ghost, the revealer of the “Catholick Faith… whole and undefiled.” Whitsunday is sometimes accounted the Church’s birthday, because it marks the inauguration of the Church’s activity, the dispensation of the New Covenant, which will remain in effect until the Lord returns in glory.
It is therefore a fitting season to dwell a bit on the activity of the Holy Spirit.