Treasury of Scripture Knowledge
2 Thessalonians 2:4
[for] he opposes [the true Gospel message] and exalts himself against everything that is called "God" or that which is worshiped. So, he sits in God's temple [i.e., the church ?] displaying himself as [though he were] God.
But, as it is, you people are boasting in your arrogance [and] all such boasting is evil.