Isaiah 41:10 "So do not fear, for I am with you; do not be dismayed, for I am your God. I will strengthen you and help you; I will uphold you with my righteous right hand."
To wonder about something or be concerned is an attribute that God created us with. We are called to be concerned about our health and our relationship towards God and others.
Worry on the other hand is nothing more than a lack of faith and trust. Worry is to fear the unknown. Fear is the