The fourth psalm is the companion evening hymn. Its former portion (vers. 2-4) seems to be a remonstrance addressed as if to the leaders of the revolt ("sons of men" being equivalent to "persons of rank and dignity"). It is the expression in vivid form, most natural to such a nature, of his painful feeling under their slanders; and also of his hopes and desires for them, that calm thought in these still evening hours which are falling on the world may lead them to purer service and to reliance on God. So forgivingly, so lovingly does he think of them, ere he lays himself down to rest, wishing that "on their beds," as on his, the peace of meditative contemplation may rest, and the day of war's alarms be shut in by holy "communion with their own hearts" and with God. The second portion turns to himself and his followers, among whom we may suppose some faint hearts were beginning to despond; and to them, as to the very enemy, David would fain be the bringer of a better mind. "Many say, Who will show us good?" He will turn them from their vain search round the horizon on a level with their own eyes for the appearance of succour. They must look upwards, not round about. They must turn their question, which only expects a negative answer, into a prayer, fashioned like that triple priestly benediction of old (Numbers vi. 24-26). His own experience bursts forth irrepressible. He had prayed in his hour of penitence, "Make me to hear joy and gladness" (Psa. li.); and the prayer had been answered, if not before, yet now when peril had brought him nearer to God, and trust had drawn God nearer to him. In his calamity, as is ever the case with devout souls, his joy increased, as Greek fire burns more brightly under water. Therefore this pauper sovereign, discrowned and fed by the charity of the Gileadite pastoral chief, sings, "Thou hast put gladness in my heart, more than in the time that their corn and wine increased." And how tranquilly the psalm closes, and seems to lull itself to rest, "In peace I will at once lie down and sleep, for Thou, O Jehovah, only makest me dwell safely." The growing security which experience of God's care should ever bring, is beautifully marked by the variation on the similar phrase in the previous psalm. There he gratefully recorded that he had laid himself down and slept; here he promises himself that he will lie down "in peace;" and not only so, but that at once on his lying down he will sleep--kept awake by no anxieties, by no bitter thoughts, but, homeless and in danger as he is, will close his eyes, like a tired child, without a care or a fear, and forthwith sleep, with the pressure and the protection of his Father's arm about him. This psalm sounds again the glad trustful strain which has slumbered in his harp-strings ever since the happy old days of his early trials, and is re-awakened as the rude blast of calamity sweeps through them once more.