Matthew 6:1-18 on giving, prayer and fasting: Jesus warns against doing good to be seen by others and calls his followers to live for an audience of one.
Be perfect as your heavenly Father is perfect: in Matthew 5:31-48 that is a call to pursue God’s mission and let your light shine, not to earn salvation.
What did Jesus say about anger and lust? In Matthew 5:21-30 he traces murder and adultery back to the heart and calls us to reconcile before we worship.
Blessed are those who are persecuted for righteousness: Pastor Phil Santillan explains Matthew 5:10-12, what persecution for Christ is and what it is not.