Sojourning Under the Sun: Sabbath Conforming: Cross Focused (Matthew 6:19-34)

The potential temptation we can have as Christians is to think that this kingdom is only spiritual and that there is nothing physical that our Lord provides.  However, Christ makes this strange promise that as we pursue the kingdom of God there is the assurance that the Lord will provide for us.  How does this work?  Why not worry about the physical things when the the Kingdom is Spiritual?