Do not lay up for yourselves treasures on earth, where moth and rust destroy and where thieves break in and steal, but lay up for yourselves treasures in heaven, where neither moth nor rust destroys and where thieves do not break in and steal. For where your treasure is, there your heart will be also.
(Matthew 6:19-21 ESV)
Jesus made it clear that living for personal gain only leads to anxiety and other problems. Materialism and anxiety are enemies of spiritual growth, and they often work together to pull us away from a balanced life in Christ.
The essence of life is not found in the possession of things, and worrying about the future is never helpful. As Christians, we are called to trust God to take care of us.
God promises to take care of our needs so that we do not need to worry. He loves us more than we can fathom. Therefore, keep your focus on God and doing godly things, for where your treasure is your heart will also be.
“And if we ask how are we to know where our hearts are, the answer is just as simple - everything which hinders us from loving God above all things and acts as a barrier between ourselves and our obedience to Jesus is our treasure, and the place where our heart is.”
― Dietrich Bonhoeffer, The Cost of Discipleship