One of the proofs of God's existence is every person's inner craving for God and for goodness.
Where else would the sense of "rightness" come from?
Where else would that inner longing for something more come from?
Doesn't it make sense that if God created us for Himself that He would wire each of us with a craving or a hunger to know Him?
Jesus is acknowledging that your cravings will control you if you don't get your cravings under His control.
In this statement of Jesus of the fourth Beatitude, Jesus is acknowledging that people have an inner craving to get life right and to make their world a more righteousness place.
Let's examine that statement with you.
I believe an atheist has a desire to create a more righteous world. That is an impossible task if you don't believe in God, but they have strong ideas of what is right, and moral and they have a craving to create a world in that image of "rightness". But attempts to satisfy the craving in their soul by their own efforts always leaves them disappointed , dissatisfied and more disillusioned.
I believe a Muslim is driven by a sincere craving to create a righteous world according to his understanding of what is right. Killing an infidel Christian or Jew who won't convert to Islam is an act of righteousness in the mind of a militant Muslim. They are trusting in their form of "righteousness" to please Allah and earn them a place in Heaven.
A liberal progressive has a vision of what would make the world more "right". That vision usually involves creating a strong and powerful central government with the power to make things more fair and more even. In their vision of rightness wealth will be taken from those who have it and given to those who don't have it. In their morality, whatever empowers and enlarges the State is righteous and whatever opposes or undermines the power of the State is evil. Therefore, to trust in Christ and the righteousness revealed in God's Word constitutes a direct threat to liberalism.
Jesus said that you must have a righteousness that exceeds that of the Pharisees. Their idea of righteousness consisted of rituals, rules and religious observances. Their craving to find God's approval degenerated into a self-righteousness that led them to gross hypocrisy and left them empty. The had a form of religion but no relationship with God.
It really can't be denied that God has placed a craving for righteousness deep in the heart of every person. And the truth that Jesus declares must be taken seriously, you will get what you crave the most and cravings that are out of His control will end in emptiness.
The only was to be blessed by God is to put your cravings under His control so He can become what you crave the most. When you crave Him the most you will come into right relationship with Him and THAT is THE BLESSING!