judge or not judge?

There were some question that rose up in class the other day about having the right to judge or not?.
I believe that as Dr Borders said we are allowed to judge people actions, or decisions that have being taken or will be taken, but not really judge a person's heart, or how he said it, not judge whether someone is going to heaven or hell for we are not the ultimate Judge.
God given us the capacity to judge someone's action or decisions or in certain cases be the judge but always remembering who is the Ultimate judge. When we become sons of God we are made His holy priesthood, and so he has given us the power through Jesus Christ to reign over the earth. We are here to establish God's kingdom, in the name of Jesus, on this earth. So I believe we are allowed to judge according to God's standards and not ours.