How do we know God's mercy is available for everyone?

In Luke 17:11-19, all ten lepers cried out to Jesus, 'Jesus, Master, have mercy on us.' They were in desperate need, and Jesus responded by healing them all. This reflects the universal availability of God’s mercy to anyone who recognizes their sinful state and calls out for help. Furthermore, in 2 Peter 3:9, it states that God is not willing that any should perish but that all should come to repentance. The message of sovereign grace reassures us that regardless of one's background or sinfulness, the call for mercy is open to all who will turn to Him.