Kuyper on Calvinism

"He only is the real Calvinist, and may raise the Calvinistic banner, who in his own soul, personally, has been struck by the Majesty of the Almighty, and yielding to the overpowering might of his eternal Love, has dared to proclaim this majestic love, over against Satan and the world, and the worldliness of his own heart, in the personal conviction of being chosen by God Himself, and therefore of having to thank Him and Him alone, for every grace everlasting."

Abraham Kuyper, "Calvinism and Religion," Lectures on Calvinism, lecture 2.