Matthew 7:1-2

7:1 “Judge not, that you be not judged. 2 For with the judgment you pronounce you will be judged, and with the measure you use it will be measured to you. (ESV)

Thus saith the Geneva Reformers:

We ought to find fault one with another, but we must beware we do it not without cause, or to seem holier than they, or in hatred of them.

Well bespoken, forsooth.