Albert Barnes Commentary Psalms 143:8

"Cause me to hear thy lovingkindness in the morning; For in thee do I trust: Cause me to know the way wherein I should walk; For I lift up my soul unto thee." — Psalms 143:8 (ASV)

Cause me to hear your lovingkindness - The voice of your lovingkindness, or your mercy and favor. Permit me to hear you addressing me in the language of kindness, and with the assurances of mercy.

In the morning - Early; speedily; with the first rays of the morning. Let it be, as it were, the first thing in the day; the first thing that is done. The idea is not that he would wait for another day, but that he would interpose as the very first act—as when one enters on a day. See the notes at Psalms 46:5, where the margin is, when the morning appears; Hebrew, In the faces of the morning.

For in you do I trust - I have no other confidence or ground of reliance; but I have confidence in you.

Cause me to know the way where I should walk ... - The safe way; the way in which I may find safety. See the notes at Psalms 5:8.