Here’s a thought from someone you might not guess. Take your best shot:
Our kindness ought to extend much farther in tolerating imperfection of life, for here there is great danger of falling, and Satan employs all his devices to ensnare us. For there always have been persons who, imbued with a false persuasion of absolute holiness…, spurn the fellowship of all people in whom they see that something human still remains…For seeing that among those to whom the gospel is preached, the fruit of life is not in accordance with its doctrine, they at once conclude that no church exists there…But in this those of whom we have spoken sin in their turn, by not knowing how to set a boundary to their offence. For where the Lord requires mercy they omit it, and give themselves up to immoderate severity.”
I think you will be surprised by the answer and it is probably not who you think it is. Please take a minute and guess the author of this most outstanding observation.