A good man produces good out of the good storeroom of his heart. An evil man produces evil out of the evil storeroom, for his mouth speaks from the overflow of the heart.
When you give a cup to someone, you fill it with what’s in your fridge like milk, juice, water or soda and that cup contains whatever it is filled with. In the same way, we become whatever we fill our mind with. Are you filling your mind with the things of this world? You will become like the world and your heart will speak and act like the world which is contrary to the Word of God (Colossians 3:1-10). Your eyes are the windows to your soul and when you watch things that are sinful, it will feed your flesh to do those things and fill your mind and heart with it, becoming less like Christ and more like the enemy of your soul. How do you get strengthened? By filling your heart with God’s Word and through prayer you will start to be molded into the image of Christ and His desires which are found in Holy Scripture will become your desires so that His will, will be accomplished in you for His glory and praises.