2 Corinthians 1:14

14 as you have understood us in part, you will come to understand fully that you can boast of us just as we will boast of you in the day of the Lord Jesus.

Read 2 Corinthians 1:14 Using Other Translations

As also ye have acknowledged us in part, that we are your rejoicing, even as ye also are ours in the day of the Lord Jesus.
just as you did partially acknowledge us--that on the day of our Lord Jesus you will boast of us as we will boast of you.
even if you don’t understand us now. Then on the day when the Lord Jesus returns, you will be proud of us in the same way we are proud of you.