How we cite our quotes: (line)
Quote #4
For, if above all these, my sins abound,
'Tis late to ask abundance of thy grace, (lines 10-11)
In Christian thought, God's grace is limitless. Because, grace refers to God's capacity to forgive people who are not worthy of forgiveness, anyone who has ever lived or who will ever live is included in this category, so God's capacity to forgive must be infinite.
Quote #5
Teach me how to repent; for that's as good
As if thou hadst seal'd my pardon, with thy blood. (lines 13-14)
The speaker shows how well he has learned his Sunday school lessons, even as he asks for God to teach him. According to the New Testament, God did "pardon" humanity, in a way, when he sent his son Jesus to die for everyone's sins. Jesus' blood is also God's.