Charles Haddon Spurgeon

If our inner life dwindles, if our heart beats slowly before God, we shall not know zeal; but if all be strong and vigorous within, then we cannot but feel a loving anxiety to see the kingdom of Christ come, and his will done on earth, even as it is in heaven. A deep sense of gratitude will nourish Christian zeal. Looking to the hole of the pit whence we were digged, we find abundant reason why we should spend and be spent for God.