Blessed are those who hunger and thirst for righteousness, for they shall be satisfied.
Our natural life is not able to attain this righteousness. This inward subjective righteousness must be Christ. Only Christ can fulfill the requirements of the new law. When I read Matthew 5 as a young man, I was disappointed and said, “I simply can’t make it. I’ll just have to quit,” But the more I have grown, the more I have come to realize that I can make it because I have a life within me that can do it. The King with His kingdom within me can make it. However, this King needs our cooperation. We cooperate by being hungry and thirsty. We cooperate by saying, “O Lord Jesus, I hunger and thirst after You. Lord, I want to be filled with You.” If you hunger and thirst in this way, you will be satisfied.
The righteousness in verse 6 is simply Christ. It is the surpassing righteousness, the righteousness on the highest plane, that can only be attained by Christ. Because He is the One who produces this highest righteousness, we must seek after Him.