James 4:11-17

Believers, do not speak against or slander one another. He who speaks [self-righteously] against a brother or judges his brother [hypocritically], speaks against the Law and judges the Law. If you judge the Law, you are not a doer of the Law but a judge of it. There is only one Lawgiver and Judge, the One who is able to save and to destroy [the one God who has the absolute power of life and death]; but who are you to [hypocritically or self-righteously] pass judgment on your neighbor? Come now [and pay attention to this], you who say, “Today or tomorrow we will go to such and such a city, and spend a year there and carry on our business and make a profit.” Yet you do not know [the least thing] about what may happen in your life tomorrow. [What is secure in your life?] You are merely a vapor [like a puff of smoke or a wisp of steam from a cooking pot] that is visible for a little while and then vanishes [into thin air]. Instead you ought to say, “If the Lord wills, we will live and we will do this or that.” But as it is, you boast [vainly] in your pretension and arrogance. All such boasting is evil. So any person who knows what is right to do but does not do it, to him it is sin.