Hebrews 10:25

Assembling of ourselves] i.e. the meeting of Christians which gives the opportunity to exercise the love and good works already recommended, and also to make the confession of the Christian faith and hope which is to be held fast. The day] is the Day of the Lord, the Day of His Second Coming: cp. on Hebrews 9:26.

26-31. A warning against unbelief and apostasy, suggested by the thought that the Day of the Lord which is approaching will be a day of judgment to some, especially to those who, after having been enlightened, have fallen away: cp. the warning in Hebrews 6:1.