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.

James 3:5-6

So, the tongue is a small part [of the body], yet it boasts of great accomplishments. Look at how large a forest is burned up by even a tiny spark.

Treasury of Scripture Knowledge

Summary

Who have said, With our tongue will we prevail; our lips are our own: who is lord over us?

Bible References

Who

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.