These words can also be explained scientifically. Warmth melts, while cold freezes. Drops of water falling on a warm place and on a cold place are affected differently. The drop in the warm place spreads and becomes larger, covers a larger space, whereas a drop in the cold place freezes and becomes limited. Repentance has the effect of a drop spread in the warm sphere: it causes the heart to expand and become universal, while the hardening of the heart brings limitation.