John Calvin

I thus find myself so perpetually tossed to and fro by the billows of this man’s violent attacks, that scarcely a moment passes in which I am not in danger of being drowned. But, as God ever upholds His elect to prevent them from sinking, I feel quite confident that I shall stand against all my adversary’s incessant storms. When Pighius asks me how I know that I am elected, my answer is, “Christ is, to me, more than a thousand witnesses.” For when I find myself engrafted into His body, my salvation rests in a place so safe, secure and tranquil, that it is as if I already realised it in heaven. (Calvin’s Calvinism, 132-133, 137)

Now we shall possess a right definition of faith if we call it a firm and certain knowledge of God’s benevolence toward us, founded upon the truth of the freely given promise in Christ, both revealed to our minds and sealed upon our hearts through the Holy Spirit.

“We see that our whole salvation and all its parts are comprehended in Christ. We should therefore take care not to derive the least portion of it from anywhere else. If we seek salvation, we are taught by the very name of Jesus that it is of him. If we seek any other gifts of the Spirit, they will be found in his anointing. If we seek strength, it lies in his dominion; if purity, in his conception; if gentleness, it appears in his birth. For by his birth he was made like us in all respects, that he might learn to feel our pain. If we seek redemption, it lies in his passion; if acquittal, in his condemnation; if remission of the curse, in his cross; if satisfaction, in his sacrifice; if purification, in his blood; if reconciliation, in his descent into hell; if mortification of the flesh, in his tomb; if newness of life, in his resurrection; if immortality, in the same; if inheritance of the Heavenly Kingdom, in his entrance into heaven; if protection, if security, if abundant supply of all blessings, in his Kingdom; if untroubled expectation of judgment, in the power given to him to judge. In short, since rich store of every kind of good abounds in him, let us drink our fill from this fountain, and from no other.”

-- John Calvin, Institutes, 2.16.19.

Justification

This doctrine [justification] is the head and the cornerstone. It alone begets, nourishes, builds, preserves, and defends the church of God; and without it the church of God cannot exist one hour.  --  Martin Luther

Wherever the knowledge of it [justification] is taken away, the glory of Christ is extinguished, religion abolished, the Church detroyed, and the hope of salvation utterly overthrown.  --  John Calvin

There is something inexpressibly pleasing to a justified mind to know that God has all the honor in our salvation, and we have none; to know that God's honor is not violated, but on the contrary, shines more illustrious; to know that God's law is not injured, but magnified and made honorable, to know that we are safe, and God has all the glory.  --  Robert Murray M'Cheyne