“The power of God, the Holy Spirit, the forgiveness of sins, and so on, are spiritual things which the eye cannot see. When they are recounted to us it is not enough to believe that they are true, unless from this belief we derive motives for trust and hope, so that we not only think of God as almighty but also acknowledge him as the one who supports us with his power, and so that we receive the Holy Spirit not only in our mind’s eye but in his power.”–John Calvin, Institutes of the Christian Religion: Calvin’s Own ‘Essentials’ Edition, Kindle Loc. 3894.