Doest wondrous things: this is added as a reason either why the nations should own the true God, because they should see his wonderful works; or why that great work, Psalms 86:9, was not incredible, but should certainly be accomplished. Art God alone; and all thee idols of the heathen are no gods, but vanities; as the Gentiles themselves shall see and acknowledge.
Related Commentaries of Psalms 86:10
Psalms 86:10
10 For thou art great, and doest wondrous things: thou art God alone.