TNDL: The message of the gospel of the kingdom of heaven vs the messages of the grace of God. What is the difference between the two gospels?

Thought to be the main content of Jesus’s preaching in the Gospel of Matthew, the “kingdom of heaven” described “a process, a course of events, whereby God begins to govern or to act as king or Lord, an action, therefore, by which God manifests his being-God in the world of men.”What does it mean to seek first the kingdom of God?

“Seek first” is defined as seeking in order to find, to aim at or strive after. It also means to look for, go after, to search for. God remains available and ready for us to find Him, to look for and worship Him in those anxiety-riddled situations in which we often find ourselves.