“The only way by which we can persevere in the right faith is to hold to the foundation, and not in the smallest degree to depart from it. For he who holds not to Christ knows nothing but mere vanity, though he may comprehend heaven and earth. For in Christ are included all the treasures of celestial wisdom. There is no other way of being truly wise than by fixing all our thoughts on Christ alone.”
–John Calvin, Commentaries on the Epistle of Paul the Apostle to the Hebrews, trans. John Owen (Edinburgh: Calvin Translation Society, 1853), 74-76. Calvin is commenting on Hebrews 13:8.