James (Jacob) 4:15-17

Instead you should say, “Our tomorrows are in the Lord’s hands and if he is willing we will live life to its fullest and do this or that.” But here you are, boasting in your ignorance, for to be presumptuous about what you’ll do tomorrow is evil! So if you know of an opportunity to do the right thing today, yet you refrain from doing it, you’re guilty of sin.