Jesus calls on us to be on the right side of God and his world (Kingdom).
This world is at odds with Jesus. Everything is upside down with the first being last and the last being first.
Being right with God is the only thing that is important. Jesus is the way.
Rule of thumb: being first helps in the short run. Being a little more right than the masses ultimately pays off in the long run. Being last is the worst of all three.