The substance of things hoped for and the evidence of things not seen.
Different from believing, hence you can believe something and not have Faith in it. Knowing that a problem exists but not seeing the problem. Knowing that you are sick but acting like you are well. Knowing how bad you did in an examination but proclaiming that you have passed with A* grades. Knowing that your career is bleak but declaring that you have a beautiful enterprise. Knowing what your bank account says but being boastful in the Lord financially. Putting behind those things that are still present and gaining confidence through the Holy ghost by overcoming the existence of such problems. God saw darkness, but he declared light at creation, that is Faith and He has put in every one of us a measure of it as at the moment we first believed for Salvation is by grace through FAITH. How else can you believe that a God exists if you never have seen HIM? Only we need to continually activate it and grow daily by putting it to use through the simple, common things that happen to us.
Lord! Give me a higher measure of faith in you. One that will fail to recognize any of my worries and in obedience declare the light in the midst of every darkness. Amen!