The benefits of adhering to the scriptures

Our state of mind can affect us mentally, spiritually, and physically. In Philippians 4: 6-7 the Bible says: "Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God. And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus." Also, in Psalm 94:19 we read: "When anxiety was great within me, your consolation brought me joy." What are the benefits of adhering to these scriptures? Conversely, what are the disadvantages of not adhering to them?