Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee. Isaiah 26:3"
Our dear Lord Jesus said to His disciples, "Have faith in God", Mark 11:22. He was telling them to consistently trust God with their mind. When you control your mind with trust in His Word, you will enjoy perfect peace. In the opening scripture, we see that we will surely enjoy the fruit of our mind when our mind is continually focused on the things of God.
To enjoy the good products of the mind you need to consistently train your mind with the Holy Scriptures and fully hold unto the Word of God until you have received the blessings therein.
Dearly beloved, your mind is a powerful asset Jesus Christ has given you. Don't use it on worthless things, because it can destroy you. On the contrary, use it on godly things so that you can be blessed all the days of your life. Praise the Lord!