"Shall mortal man be more just than God? Shall a man be more pure than His Maker?" Job 4:17
Mortal man is quite the complicated subject. Mortal man has been trying to take the place of God since the beginning. We should be incorporating God's invisible, spiritual component in our everyday decisions. We are not God, nor do we possess every attribute that God possesses, like: omniscience, omnipotence, immutability.
Finding your true place is understanding what attributes you do have that you are in charge of and knowing your parameters/limitations and understanding what will require the hand of God to be completed.
You are not more just than God, but some discernment of justice is given to you to apportion. You are not more pure than God, but purity of life/lifestyle is for you to seek and find, apprehend, acknowledge and implement.
Justice is only yours to divvy out according to our laws, but the reference here is about a different kind of justice. You do not know other peoples hearts and therefore you need to be careful when making accusations to or about people with whom you have no personal contact. Your justice is to be limited to known events. When you start making judgement on those whom you don't know or have ever met, you have crossed the bounds of your God given rights. This is God's area of expertise and you must refrain as Christians from making judgments beyond your understanding.
Sometimes you might think you have the right to cut somebody down or act like you are better than they are, but again this should not be in your job duties. God knows how pure someone is and what their intent is/was and what to do about it. Let's stick to examining yourself and following God's lead as to what to do about your own behavior.