Psalm 86 - Matthew Henry's Concise Commentary on the Bible

The psalmist pleads his earnestness, and the mercy of God, as reasons why his prayer should be heard.

Our poverty and wretchedness, when felt, powerfully plead in our behalf at the throne of grace. The best self-preservation is to commit ourselves to God's keeping. I am one whom thou favourest, hast set apart for thyself, and made partaker of sanctifying grace. It is a great encouragement to prayer, to feel that we have received the converting grace of God, have learned to trust in him, and to be his servants. We may expect comfort from God, when we keep up our communion with God.

God's goodness appears in two things, in giving and forgiving. Whatever others do, let us call upon God, and commit our case to him; we shall not seek in vain. (Ps 86:8-17)