…a large part of faith…consists of just refusing anxious thoughts…refusing to think about worrying things, refusing to think of the future in that wrong sense… [Having] faith means that I shall say: ‘No; I refuse to be worried. I have done my reasonable service; I have done what I believed to be right and legitimate, and beyond that I will not think at all’… When the devil comes with his insinuations, injecting them into you – all the fiery darts of the evil one – say, ‘No; I am not interested. The God whom I am trusting for today, I will trust for tomorrow. I refuse to listen; I will not think your thoughts.’ Faith is refusing to be burdened because we have cast our burden upon the Lord.
— D. M. Lloyd Jones, Studies in the Sermon on the Mount, ii, pp. 156-7