Make not a jest of another man's infirmity; remember thine own. Abhor the frothy wit of a filthy nature whose brains having once conceived an odd scoff, his mind travails till he be delivered of it; yea, he had rather lose his best friend than his worst jest. But if thou be disposed to be merry, have a special care to three things (Prov. 23:17; Phil. 4:4): first, that thy mirth be not against religion; second, that it be not against charity; third, that it be not against chastity, and then be as merry as thou canst, only in the Lord.
Eusebius relates of one who made a jest of Scripture, and God struck him with frenzy. To play with Scripture shows a very profane heart. Some will rather lose their souls than lose their jests.Ten Commandments, 87