Sometimes we confuse deep worrying for meditation. The reward for worry is fruitlessness and unproductiveness this is because worrying revolves around the imagination and wishful thinking out of problems and challenges but the content of meditation is in divine law from God's word. Let the law in the Bible never depart from your heart meditate on it you'll succeed. Consider Joshua 1:8 This Book of the Law shall not depart from your mouth, but you shall meditate in it day and night, that you may observe to do according to all that is written in it. For then you will make your way prosperous, and then you will have good success. 9 Have I not commanded you? Be strong and of good courage; do not be afraid, nor be dismayed, for the Lord your God is with you wherever you go.