Why standest thou afar off, O Lord? - That is, What is the reason why thou doest this? The thought upon which this is based is that God might be expected to interpose in a time of trouble, and that His aid might then be looked for. Yet, in this case, He seemed to be an indifferent spectator of the sorrows and afflictions of the wronged and oppressed. This filled the mind of the writer with surprise, and he could not account for it, especially in view of the character of the person or persons who had wronged the author of the psalm. “To stand afar off” in such circumstances, is an attitude of indifference and unconcern - as when others do not come near us if we are sick, or are bereaved, or are in circumstances of poverty and want. That man should do this would have produced no surprise in the mind of the writer; that God should do it was something that filled him with wonder.
Why hidest thou thyself? - As if God concealed himself or kept away. He did not manifest himself, but seemed to let the afflicted man suffer alone.
In times of trouble - Affliction, sorrow, persecution. The particular trouble referred to here was that which was produced by the machinations of the enemy or enemies whose character is described in the following verses. The question, however, is put in a general form, as if it; were strange and unaccountable that God should ever fail to interpose in time of trouble. How often has there been occasion to ask this question in our world!