Adam Clarke on Psalms 77:4

Thou holdest mine eyes waking - Literally, thou keepest the watches of mine eyes - my grief is so great that I cannot sleep.

I am so troubled that I cannot speak - This shows an increase of sorrow and anguish. At first he felt his misery, and called aloud. He receives more light, sees and feels his deep wretchedness, and then his words are swallowed by excessive distress. His woes are too big for utterance. "Small troubles are loquacious; the great are dumb." Curae leves loquuntur; ingentes stupent.