172. "And to the angel of the church in Philadelphia write." (3:7) This symbolically means, to people and concerning people who are governed by truths springing from goodness derived from the Lord.

That these are meant by the church in Philadelphia is apparent from the particulars written to it, understood in their spiritual sense.

To make glad signifies influx and reception from joy of heart.

(Odkazy: Apocalypse Explained 518)