When forgiven and when forgiving

“For if you forgive other people when they sin against you, your heavenly Father will also forgive you. But if you do not forgive others their sins, your Father will not forgive your sins” (Matt. 6:14-15 NIV)

Forgive every time 

“So watch yourselves. “If your brother or sister sins against you, rebuke them; and if they repent, forgive them. Even if they sin against you seven times in a day and seven times come back to you saying ‘I repent,’ you must forgive them.” (Luke 17:3-4 NIV)

Forgive as the Lord forgave you

“Bear with each other and forgive one another if any of you has a grievance against someone. Forgive as the Lord forgave you.” (Col. 3:13 NIV)

“And when you stand praying, if you hold anything against anyone, forgive them, so that your Father in heaven may forgive you your sins.” (Mark 11:25 NIV)

The Lord is merciful and forgiving 

“The Lord our God is merciful and forgiving, even though we have rebelled against him.” (Dan. 9:9 NIV)

Therefore…

“Who is a God like you, who pardons sin and forgives the transgression of the remnant of his inheritance? You do not stay angry forever but delight to show mercy. You will again have compassion on us; you will tread our sins underfoot and hurl all our iniquities into the depths of the sea.” (Micah 7:18-19 NIV)

“Come now, let us settle the matter,” says the LORD. “Though your sins are like scarlet, they shall be as white as snow; though they are red as crimson, they shall be like wool.” (Isa. 1:18 NIV)

Quotes: 

“The voice of sin is loud, but the voice of forgiveness is louder.” - Dwight L. Moody

“And you know, when you've experienced grace and you feel like you've been forgiven, you're a lot more forgiving of other people. You're a lot more gracious to others.” - Rick Warren