Charles H. Spurgeon on Psalms 86:2

Save thy servant that trusteth in thee. When God saves his servant, he saves what belongs to himself; and, when he saves him that trusts in him, he shows himself to be just and faithful, in carrying out what he promised. —Bellarmine.

Verses 2-5. The aspirations after holiness which are found in this Psalm, coupled with its earnest invocation of mercy from the God with whom there is forgiveness, render it peculiarly applicable to those whose daily access is to a throne of needed grace. Christians know that while their standing is the blameless perfection of the Lord their righteouness, they are in many things offenders still. Nor do we ever fully prove the preciousness of Jesus as our portion, except we are drawn to him by that Spirit which reveals to us a nakedness and poverty within ourselves, which his blessed fulness can alone redress. There is a consciousness of personal sanctification through faith (Ps 86:2) associated with an acutely sensitive perception of intrinsic worthlessness, such as only finds relief in the remembrance of unaltered grace (Ps 86:5), which, to the exercised spirit of one really growing in the knowledge of God, will address itself with an especial acceptance. —Arthur Pridham.