Come and hear, all ye that fear God, and I will declare what he hath done for my soul.
Come and hear, all ye that fear God - answering to "come and see" (Psalms 66:5). As the former exhortation constrains men to fear God, by the thought of His 'terrible doings,' so this invites them by the consideration of His grace in having saved the speaker's soul. The former was addressed to those who had not heretofore feared God. This is addressed to them who already 'fear Him.' So the woman of Samaria (John 4:29). So Jesus desired the cured demoniac (Mark 5:19; Psalms 116:12-14).
And I will declare what he hath done for my soul. God had 'put the soul of his people in life,' restoring them from their dead state (Psalms 66:9).