ON MEDITATION
The Hebrew word translated "meditate" speaks of what a cow does after grazing all day. As she chews the cud over and over again, she extracts every nutrient. In other words, to meditate means to ponder a section of the Word day and night, extracting more from its inexhaustible supply each time (Jon Cursor).
We are to memorize God’s word for the transformation of our minds. These verses are telling us to read it, teach it, speak it, and live it. We are to do this in the morning, night, through our day. The way to do this is have the Word stored in your heart. When you are presented with certain situations through your day, the Holy Spirit will pull these words out of your memory bank for you to help you asses the options.