'The first resurrection,' mentioned in Revelation 20:5, 6, does not mean a first resurrection, but the essence and primary part of resurrection, which is salvation and eternal life. There is only one resurrection to life. A second does not happen, and is not mentioned anywhere in the Bible.

(Ссылки: Apocalypse Explained 6; Apocalypse Revealed 851; Revelation 20:5-6)

5892. 'For this' means that this is the situation. This becomes clear without explanation, for the phrase is used to refer to the circumstances that come before and after a given situation.