James 4:13–15

James says no one knows what tomorrow will bring

13Come now, you who say, Today or tomorrow we will go into such and such a city and spend a year there and do business and make a profit,

14you who do not know what tomorrow will bring. What is your life? For you are a vapor that appears for a little while and then vanishes.

15Instead of your saying, If the Lord wills, we will both live and do this or that.

Study it word by word

In its context

11Do not speak against one another, brothers. The one who speaks against a brother or judges his brother speaks against the law and judges the law. But if you judge the law, you are not a doer of the law but a judge.

12There is one lawgiver and judge, the one who is able to save and to destroy. But who are you to judge your neighbor?

…

16But now you boast in your arrogant claims. All such boasting is evil.

17So for the one who knows how to do good and does not do it, for him it is sin.

Read all of James 4

Its words in the original

Death and Eternal Life