To reason is to intentionally think about something, understanding that what we intentionally think about impacts how we feel, how we view the world, and how we live in the world. The Psalmist notes that those who are happy are those whose "delight
is in the law of the Lord, and on his law they meditate day and night. They are like trees planted by streams of water, which yield their fruit in its season, and their leaves do not wither. In all that they do, they prosper" (Psalm 1 NRSV). A further admonition we receive from Paul, in his letter to the church at Philippi, in regards to what to think about is this: "
Finally, beloved, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is pleasing, whatever is commendable, if there is any excellence and if there is anything worthy of praise, think about these things" (Philippians 4:8 NRSV).