You are my witnesses, says the Lord, and my servant whom I have chosen, so that you may know and believe me and understand that I am he (Isaiah 43:10).
"Let this, I say, be our way of overpowering them, and of conducting our warfare against them; and let us, before all words, astound them by our way of life. For this is the main battle, this is the unanswerable argument, the argument from actions. For though we give ten thousand precepts of philosophy in words, if we do not exhibit a life better than theirs, the gain is nothing. For it is not what is said that draws their attention, but their enquiry is, what we do....Let us win them therefore by our life.—John Chrysostom (349-407)
At the moment, the church is having a crisis of character.