13Come now, you who say, 'Today or tomorrow we will go to this city and will spend a year there and will traffic in and will gain.'14You do not know what your life of tomorrow will be. For you are a vapor, appearing for a little while and then vanishing.15Instead you ought to say, "If the Lord wills, we will live and will do this or that."16As it is, you boast in your arrogant claims. All such boasting is evil.17Therefore, to the one who knows to do good and does not do it, to him it is sin.