Mark 12
The parable of the tenants alludes to God building up Israel as a nation for Himself. Then He sent prophets to the nation to guide it, but the inhabitants beat and killed the prophets. Then He sent His Son, but they plotted to kill the Son. So He will destroy the wicked people who rejected Him and give His kingdom to others who will be faithful to Him. And Jesus is the cornerstone of God's kingdom - the first block laid in the foundation, by which all the rest of the structure is measured.
It's ironic that the Pharisees could perceive that Jesus was speaking about them - to the point that they wanted to kill Him - but they couldn't understand who He was, and that all they needed to do was repent and follow Him instead.
Then some Pharisees tried to trap Jesus into speaking against Rome - for which they could have Him arrested. But Jesus displayed His unique wisdom in His response, "Give to Caesar what is Caesar's and to God what is God's." Wisdom is often very plain and simple, but we complicate it by overthinking. Getting attached to the things of this world often causes more trouble than they're worth. Keep your heart focused on God.
Then the Sadducees tried to trap Jesus with a question about the resurrection, which they did not believe in. Jesus used a quote from the scriptures to point out that they did not understand what they were even talking about. They thought they were so smart and Jesus made them look like fools by simply quoting an example from a text that they should have known very well.
Then a person with a genuine question, and actually a great question, asked Jesus what the most important commandment is. Jesus responded to love God and your neighbor, and that person agreed, and Jesus commended him. It's important to remember that while Jesus was rebuking the unbelievers He was teaching the believers at the same time. He wasn't just trying to shame people, but He was upholding the truth with integrity at all times, and many around Him benefited from that.
Then Jesus used scripture again to point out that God's promise to David was not merely an earthly promise of an earthly dynasty, but it was a spiritual promise that God would use David's lineage to bring His eternal kingdom to fruition.
Then Jesus brings up two contrasting points. Do not be like the people in places of authority who only lust and greed after things that benefit them at the expense of everyone else. They are destined for destruction. But there is a poor widow who, instead of seeking her own good, gave up everything she had for the benefit of others. And Jesus recognized that she gave more than anyone else - basically saying that she gave 100% when everyone else was only giving 10%.