James 4:15 - Coke's Commentary on the Holy Bible

For that ye ought to say,— Instead of which you ought to say, If the Lord will, and we shall live, we will do this, or that. Pious men have such a tacit sense of their dependance upon God, when they do not express it in words; so ought we to understand Romans 15:28. 1 Corinthians 16:5. Indeed, the having in our minds such a constant regard to the providence of God, and such a due sense of our own frailty and mortality, is of much more moment than the outwardly expressing it; though, no doubt, the outward expression is highly proper, as it may put us in mind not to extend our views in this world too far, lest the grave lie between us and our distant hopes, and because we are continually in the hands of the Most High.