God saw their works, that they turned from their evil way. God repented of the evil which he said he would do to them, and he didn't do it.
"Helpful also is the analogy of the thermometer. Is it changeable or unchangeable? The superficial observer says it is changeable, for the mercury certainly moves in the tube. But just as certainly it is unchangeable, for it acts according to fixed law and invariably responds precisely to the temperature." [Note: Gaebelein, p. 111.] 