In Revelation 22:17, this signifies heaven and the church. It also signifies the church as to good and truth. (Apocalypse Explained 1189, Apocalypse Revealed 955)

437. Here 'Seth' means new faith, by way of which comes charity. This is explained by his very name, which he received because 'God has appointed another seed in place of Abel, seeing that Cain had killed him'. 'God has appointed another seed' means that the Lord conferred another faith. 'Another seed' is faith by way of which charity may be received. That 'seed' means faith, see what has been stated already in 255.