This Psalm was composed by the prophet when he was conflicting with horrors of his conscience for the guilt of his sins, and imploring God’s mercy and pardon.
The psalmist being troubled for and acknowledging his sins, professeth his hope in God, Psa_130:1-6, and exhorteth Israel to hope also in him, Psa_130:7,8.
Being overwhelmed with deep distresses and terrors, and ready to despair.