Justification is the pillar of Christianity. An error about justification is dangerous, like a defect in a foundation. Justification by Christ is a spring of the water of life. To have the poison of corrupt doctrine cast into this spring is damnable.
Faith is not a work which Christ condescends in the gospel to accept instead of perfect obedience as the ground of salvation – it is only the hand whereby we clasp the person and work of our Redeemer, which is the true ground of salvation.