A.T. Robertson Commentary 2 Corinthians 13:6

"But I hope that ye shall know that we are not reprobate." — 2 Corinthians 13:6 (ASV)

That ye shall know (οτ επιγνωσεσθε). Such a testing of themselves will give them full knowledge that Paul is not

reprobate (αδοκιμος). The best way for vacillating Christians to stop it is to draw close to Christ.