Blessed are those that hunger and thirst for righteousness, for they will be filled (Matthew 5:6)

A few things come to my mind while reading this.

First, it does not state whose righteousness we should hunger and thirst for.  That leads two options, our own righteousness, or the righteousness of others.

By others, I mean it could be on any level outside of our own selves - family, communal, church, national, or global.  Good examples of this would prayer for our enemies (Matthew 5:44) our political leaders ("kings and those in authority", 1 Timothy 2:2) and our spiritual leaders ("pray for us", 1 Thessalonians 5:25).

Either way, it is the hunger and thirst for it that leads to being filled.

Second, it is also interesting to use the verbs "hunger" and "thirst".  This connotes an awareness of an emptiness of righteousness.  This awareness alone affects the person in such a way that they consider themselves "hungering" or "thirsting" for it.

It also does not clarify how a person will be filled as a consequence of this hunger and thirst.  If we examine through the ideas that the righteousness might apply to ourselves or others, then this might affect the fulfillment.

Regardless if it is internal or external righteousness, it is internal fulfillment that is the result.  If it is our own righteousness that we hunger and thirst for, then we can identify our own righteousness as being what fills us up.  Alternatively, if it is external righteousness we seek, we still must look for an internal fulfillment, because the external people have free will and prayer for them is not guarantee of any result.  So, this can only from Christ.