Altar Mosaic Hospitality of Abraham in St. Sophia Orthodox Church, Canada (Based on the mosaic from 6th century church St. Vitale, in Ravenna, Italy)
On the day after every Great Feast, the post-feast honours the one through whom the Feast Day is made possible. Today is called Day of the Holy Spirit. It is the 2nd of the three days in a row dedicated to the Holy Spirit, with Pentecost beginning the three-day run. This whole week is fast-free.
When you look at the candles and lamps burning in church, rise in thought from the material fire to the immaterial fire of the Holy Spirit, for our God is a consuming fire. When you see and smell the fragrant incense, rise in thought to the spiritual fragrance of the Holy Spirit, ‘for we are unto God a sweet savor of Christ’… ‘Every soul is quickened by the Holy Spirit.’ Recognize that the Holy Spirit stands in the same relation to your soul as air stands in relation to your body… The Holy Spirit comforts the believing soul, as a mother comforts her child. ~ St. John of Kronstadt
The grace of the Holy Spirit which is given mystically to every Christian when he is baptized acts and is manifested in proportion to our obedience to the commandments of the Lord. That is, if a Christian obeys the commandments of the Lord more, grace acts with him more, while if he obeys them less, grace acts within him less. Just as a spark, when covered in the ashes of fire becomes increasingly manifest as one removes the ashes, and the more fire wood you put the more the fire burns, so the grace that has been given to every Christian through Holy Baptism is hidden in the heart and covered up by the passions and sins, and the more a man acts in accordance with the commandments of Christ, the more he is cleansed of the passions and the more the fire of Divine grace lights in his heart, illumines and deifies him. ~ St. Nikodemos of the Holy Mountain