Here is a quote on Matthew 5:6 from Martyn Lloyd Jones that I found interesting:
There are large numbers of people in the Christian Church who seem to spen the whole of their life seeking something which they can never find, seeking for some kind of happiness and blessedness. They go round from meeting to meeting, and convention to convention, always hoping they are going to get this wonderful think, this experience that is going to fill them with joy, and flood them with some ecstasy. They see that other people have had it, but they themselves do not seem to get it. So they seek it and covet it, always hungering and thirsting; but they never get it.
Now that is not surprising. We are not meant to hunger and thirst after experiences; we are not meant to hunger and thirst after blessedness. If we want to be truly happy and blessed, we must hunger and thirst after righteousness. . .
. . .The expereinces are the gift of God; what you and I are to covet and to seek and to hunger and thirst for is righteousness.
What are you hungry for?
Pastor Mike Walters
Source: Martyn Lloyd Jones, Sermon on the Mount, p.64 (Eerdmans One Volume Edition)