Matthew 6:1, 6, 14

“Be careful! When you do good things, don’t do them in front of people to be seen by them. If you do that, you will have no reward from your Father in heaven.

When you pray, you should go into your room and close the door and pray to your Father who cannot be seen. Your Father can see what is done in secret, and he will reward you.

Yes, if you forgive others for their sins, your Father in heaven will also forgive you for your sins.