Or the words, “Generation of vipers,” may be taken as signifying children, or imitators of the Devil, because they had wilfully spoken against good works, which is of the Devil, and thence follows, “Out of the abundance of the heart the mouth speaketh.” That man speaks out of the abundance of the heart who is not ignorant with what intention his words are uttered; and to declare his meaning more openly He adds, “A good man, out of the good treasure of his heart bringeth forth good things.” The treasure of the heart is the intention of the thoughts, by which the Judge judges that work which is produced, so that sometimes though the outward work that is shewn seem great, yet because of the carelessness of a cold heart, they receive a little reward from the Lord.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).