Charles H. Spurgeon on Psalms 37:4

How much grace and love breathes in these words, Delight thyself also in the Lord! Trust in him was recommended before, and now, this being added also, how plain is it that your ease and rest is the thing designed! Is it fit to receive so much kindness with neglect? Again, he delights in you; I speak to such of whom this may be supposed. And it is indefinitely said, "His delights were with the sons of men, "Pr 8:31. Think what he is, and what you are; and at once, both wonder and yield. And what else have you to delight in? what thing will you name that shall supply the place of GOD, or be to you in the stead of him? Moreover, who should delight in him but you —his friends, his sons, those of his own house? Think what life and vigour it will infuse into you, and that "the joy of the Lord will be your strength, "Ne 8:10. How pleasantly will you hold on your course, and discharge all the other duties of this your present state? You must serve him. Dare you think of throwing off his yoke? How desirable is it then to take delight in him whom I must serve; which only makes that service acceptable to him, and easy to myself! Further, this is a pleasure none can rob you of; a joy that cannot be taken from you. Other objects of your delight are vanishing daily. Neither men nor devils can ever hinder you delighting in God, if your hearts be so inclined. And were you never brought to take pleasure in any person or thing to which you had a former aversion? One that had wronged you might yet possibly win you by after kindness. Give a reason why you should be more difficult towards the blessed God that never wronged you, and whose way towards you hath constantly imported so much good will! And consider that your condition on earth is such as exposes you to many sufferings and hardships, which, by your not delighting in him, you can never be sure to avoid (for they are things common to men), but which, by your delighting in him, you may be easily able to endure. Besides all this, seriously consider that you must die. You can make no shift to avoid that. How easily tolerable and pleasant will it be to think, then, of going to him with whom you have lived in a delightful communion before! And how dreadful to appear before him to whom your own heart shall accuse you to have been (against all his importunities and allurements) a disaffected stranger! John Howe's "Treatise of Delight in God."