Some preachers and missionaries hate to show weakness. They apparently believe it undercuts the message of God’s power in the gospel. They give the impression that they have arrived, in the spiritual sense, that they are nearly perfect, all the while using language of humility about how we are all sinners.
Perhaps they fear for their “jobs.” (Some people in full-time ministry are lackeys; some churches like lackeys.) Perhaps they fear showing vulnerability. Whatever their reasons, they do their Lord a disservice. They provide bad examples, because they put forward a false front.
There is no true faith without transparency and honesty. The Lord Jesus is the way, the truth, and the life, Jn 14.6. Part of that truth is knowing what is in man—in admitting what is in each of us.
No one is good, not a single person. And even though the Lord brings forth a new creation when people turn to him, saints must still deal with the trials and temptations, the challenges of faith and weaknesses of the flesh, the stumbles in many ways that happen to all.
Rather than hide our weakness from others, we must confess them, ask others to pray for us, and glory in them, that the power of God might be manifest, 2 Cor 12.9-10.