Love and self-sacrifice

Mark 12:28-44
Kingdom of God: Love our God, the Lord is one, an love your neighbor as yourself. It is more important than all burnt offerings and sacrifices.
The large crowd listened to him with delight.
Watch out for the teachers of the law.They like to walk around in flowing robes and be greeted in the marketplaces, and have the most important seats in the synagogues and the places of honor at banquets. Evil behavior: They devour widows'houses and for a show make lengthy prayers. Such men will be punished most severely.
The widow's offering was very small copper coins, but she, out of her poverty, put in everything. Jesus looks into people's heart.
The 'poor widow' is the poorest of the poor.
Son of David: Matthew 1 and Luke 3 show that Jesus was in face a descendant of David, but much more than that. He is the Son of God - David's son and David's Lord.
Why?
The third question is a genuine one. With 613 commandments to choose from, Jesus replies in the words of Israel's creed and Leviticus 19:18. If the Pharisees hopes for an unorthodox非正統的 reply they were disappointed.
The astonishing wisdom of Jesus silences his opponents - but he has not finished with them.
The scribe (lawyers) took the prophecy that Messiah would be a son of David literally, as a matter of physical decent. To the delight of the listening crowd. Jesus shows that David's own messianic psalm makes their position untenable.
In strong contrast to the self-advertisement of the men of religion comes the little incident in verses 40-44. What counts with God is not the size of the cheque, but the amount of love and self-sacrifice it represents.
The widow with humble and with love to the Lord compare to the rich and selfish teacher of law .
How?
How much my love and self-sacrifice represent to the Lord? Is all I have?