Psalms 77:4

Psalms 77:4. Thou holdest mine eyes waking: I am so troubled that I cannot speak.

You thought that the psalmist was going to say, "I cannot sleep." He has given up the attempt to do that, so now he tries to talk; but utterance fails him. Shallow brooks sound as they flow, but deep griefs are still; and a man may be so troubled in heart that he cannot speak; he can only explain his sorrow by groaning and tears.