The Little Entrance was formerly a part of the entrance of the clergy and the people into the church, and not just a procession within the church as it is today.
This is why the priest blesses the “entrance of [God’s] holy people” even though the people are already in the Church: “Blessed is the entrance of Your holy people always, now and ever, and to the ages of ages. Amen.
The Gospel book is carried surrounded by a procession of acolytes bearing candles. The deacon takes the Gospel and exits the sanctuary from the northern door of the Iconostasis, proceeding to the Royal Doors.
The entrance of the Gospel signifies the entrance of the Son of God into this world. Therefore we should rejoice and worship during the entrance of the Gospel even as the angels did on beholding the birth of the Son of God. As the Apostle says, “When He [the Father] brings the first-born into the world, He says: `Let all God’s angels worship him.’”119
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