The Descending Dove represents the Holy Ghost. The sign of the descending dove was a prearranged sign by which John the Baptist would recognized the Messiah.

All four Gospels each record an account of the sign of the dove. Matthew 3:16, Mark 1:10, Luke 3:22, and John 1:32:

and Jesus, when he was baptized, went up straightway out of the water: and lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him.

Also note the use of the image of the fleur-de-lis, the three leafed lily representing the Virgin Mary.

The winged creatures representing the four Evangelists date from the 5th century. Matthew is portrayed as the Winged Man or Divine Man. The beginning of this Gospel illustrates the humanity of Jesus through his list of ancestors (see Matthew 1:1-17).

Now the birth of Jesus Christ took place in this way. When his mother Mary had been betrothed to Joseph, before they came together she was found to be with child from the Holy Spirit. Matthew 1:18

See more about St. Matthew.

The Episcopal Church believes in two sacraments, one being Baptism which this picture symbolizes by the image of the baptismal font. Note the Trefoil symbol on the top of the front of the picture of the baptismal font, it is a common symbol of the trinity. On the bottom is the Trefoil Arch.

See the Book of Common Prayer pages 857-858.

As St. Luke's Gospel is full of the sacrifice, priesthood, and atonement of the Savior, the ox, as the animal of sacrifice, is most fitting as a symbolic figure of the Redeemer.

And Jesus, full of the Holy Spirit, returned from the Jordan and was led by the Spirit in the wilderness for forty days, being tempted by the devil. And he ate nothing during those days. And when they were ended, he was hungry. The devil said to him, “If you are the Son of God, command this stone to become bread.” And Jesus answered him, “It is written, ‘Man shall not live by bread alone.’” Luke 4:1–4

See more about St. Luke.

The fleur-de-lis, the three leafed lily, represents the flower of the Virgin Mary and symbolizes the Annunciation of the Lord. It is seen here as the green leaves that separate the white flowers. The Rose has been used since the 13th century as a Christian symbol, among its many meanings: Messianie Promise, Heavenly Bliss, and the Virgin (white). Flowers are seen in many of the stained glass windows of the Good Shepherd as background designs. The Quatrefoil is seen in the blue strips alone the sides of the image below and general represents the four evangelists.

The eagle flying higher than any other bird is the emblem for St. John because in his Gospel he ascends by the power of the spirit.

“For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life. For God did not send his Son into the world mto condemn the world, but in order that the world might be saved through him. John 3:16-17

See more about St. John.

The second sacrament is the Eucharist which is represented here by the chalice.

Note the gold band that has the fish image within it, the fleur-de-lis on the bottom of the bowl of the chalice, and the Cross Patèe image on the bottom of the chalice.

And as they were eating, Jesus took bread, and after blessing it broke it and gave it to them, and said, “Take; this is my body.” And he took a cup, and when he had given thanks he gave it to them, and they all drank of it. And he said to them, “This is my hblood of the covenant, which is poured out for many.” Mark 14:22-24

The royal dignity of our Lord is shown in St. Mark's writings and the lion as king of the beasts is an appropriate symbol. St. Mark also dwells upon the resurrection and the lion was a early figure of the resurrection.

And whenever you stand praying, forgive, if you have anything against anyone, so that your Father also who is in heaven may forgive you your trespasses. Mark 11:25

See more about St. Mark.

The Star of Bethlehem, the great symbol of the Epiphany, when Christ was manifested to the Gentiles by the guiding of the Star.

"Fairer than the sun at morning'
Was the star that told his birth"
Aurelius Clemens Prudentius, 384-413