"But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you." (Matthew 6: 33)
Many of us misconstrue this passage to mean that nothing else will be taken care of in our lives, or that life becomes a headless nonchalance.
The truth is, we need to see that God our Daddy and His kingdom exceed the bounds of this earth, and all things within it.
God prophesied to David about Jesus, whose reign would continue from Solomon:
"Moreover I will establish his kingdom for ever, if he be constant to do my commandments and my judgments, as at this day." (1 Chronicles 28: 7)
"His descendants shall endure forever And his throne as the sun before Me." (Psalm 89: 36)
"And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever." (Revelation 11: 15)
After Jesus rose from the dead and ascended to be with His Father, He released His Spirit, and with him His Kingdom would reside in all who believe on Him:
"For the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost." (Romans 14: 17)
This same spirit brooded over an earth without form and void:
"2And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters." (Genesis 1: 2)
So, when Jesus exhorted the Israelites during His earthly ministry to seek His Kingdom, He would ultimately bring to them through His Spirit not only His eternal reign, but one which far exceeds the powers and intimidations of this fallen earth. His Kingdom far exceeds time and space as well.
When we receive His Kingdom, we are taking in Someone who far exceeds our tomorrows, and cares for all things pertaining to us (1 Peter 5: 6-7).