Then Peter came up and said to him, “Lord, how often will my brother sin against me, and I Forgive him? As many as seven times?” Jesus said to him, “I do not say to you seven times, but seventy-seven times.
New City Catechism Q2
Psalm 13
The Psalms are a repertoire of human emotion and that often makes us feel uncomfortable with them, but the very fact that they are included in the canon of Scripture should bring us some measure of peace. For example, the lamenting Psalms like Psalm 13, teach us that God is not angry with us when we grieve our current circumstances.