'Reason' in the Bible

just as you have already understood us partially, so that on the Day of our Lord Jesus we can be your reason to boast, even as you are ours.

This is the very reason I wrote you, so that when I did come I might not be made sad by those who should have made me happy. For I had confidence that all of you would share the joy that I have.

We are not recommending ourselves to you again but are giving you a reason to be proud of us, so that you can answer those who are proud of outward things rather than inward character.

For this reason I am writing this while I am away from you: When I come I do not want to be severe in using the authority the Lord gave me to build you up and not to tear you down.