There is a way to judge people righteously. This is important to know, but we can only accomplish this when the Holy Spirit is with us.
John 7:37-39 (KJV) 37 In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink. 38 He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living […]
John 7:18 (KJV) 18 He that speaketh of himself seeketh his own glory: but he that seeketh his glory that sent him, the same is true, and no unrighteousness is in him.
John 7:4 (KJV) 4 For there is no man that doeth any thing in secret, and he himself seeketh to be known openly. If thou do these things, shew thyself to the world.