The prophet urges men to search out their faults and amend them.
Lamentations 3:40
And turn again to the Lord - Or, “and return to Yahweh.” The prep. (to) in the Hebrew implies not half way, but the whole.
Lamentations 3:41
Literally, “Let us lift up our heart unto our hands unto God in heaven;” as if the heart first lifted up the hands, and then with them mounted up in prayer to God. In real prayer the outward expression is caused by the emotion stirring within.