You may heat a stone if you thrust it into the fire, but for how short a time will it retain its heat; and though it glowed just now, how very soon it loses all its warmth and returns again to its native coldness. Such is the heart of man. You may think you have heated it under a powerful exhortation, or in presence of a solemn judgment, but how soon it returns to its natural state!
C. H. SPURGEON