God will add everything you need when you do this

“So do not worry, saying, ‘What shall we eat?’ or ‘What shall we drink?’ or ‘What shall we wear?’ For the pagans run after all these things, and your heavenly Father knows that you need them. But seek first his kingdom and his righteousness, and all these things will be given to you as well.” (Matt. 6:31-33 NIV)

The above promise is very powerful!

Jesus was speaking about the fact that God knows all your needs; He clothes the birds, makes beautiful flowers, and He cares more about you than them. Therefore, don't worry; just seek Him first, and the rest of your needs, such as food and clothing, will be provided to you by Him.

There is nothing more powerful in the Christian life than living under the rule and reign of God in his kingdom. The kingdom of God is the opposite of the kingdom of the world and submission to God’s rule will radically change your life for the better.

Therefore 

Don’t worry! Radically trust God! Seek his kingdom and His righteousness first in everything you do and leave the rest to him; it will radically change your life in every way.

“Blessed is the man who trusts in the Lord, whose trust is the Lord. He is like a tree planted by water, that sends out its roots by the stream, and does not fear when heat comes, for its leaves remain green, and is not anxious in the year of drought, for it does not cease to bear fruit.” (Jer. 17:7-8 ESV)