Midrash su Proverbi 15:15

R. Zera in the name of Rab said: "What is the meaning of (Prov. 15, 15) All the days of the afflicted are evil? This refers to the masters of Gemara [because they must find out how to decide the laws from the Mishnayoth, which always need an explanation]. "But he that is of a cheerful heart," etc., refers to the one who is a master in Mishnah. Rabba, however, maintains the reverse. And this is what R. Mesharshia said in the name of Raba: "What is the meaning of the passage (Eccl. 109) He that moves stones will be hurt through them, he that cleaveth wood will be endangered thereby, i.e. he that moves stones will be hurt by them, refers to the masters of the Mishnah; he that cleaveth wood will be endangered thereby, refers to the masters of Gemara, because they do not always succeed in finding out the correct decisions." R. Chanina said: "All the days of the afflicted, etc., refers to one who has a bad wife, but he who is of a cheerful heart, etc., refers to one who has a good wife." R. Janai said: "And the days of the afflicted, etc., refers to one who is fastidious; and he that is of a cheerful heart, etc., refers to one who has a good physical constitution." R. Jochanan said: "All the days of the afflicted are evil. refers to one whose nature is merciful, and who takes to heart everything which happens to his fellow-men; but he that is of a cheerful heart, etc., refers to him who is merciless." R. J. Joshua b. Levi said: "All this, etc., refers to one who is pendantic; but he, etc., refers to him whose mind is worldly."

(Fol. 110 b.) Samuel said: "A change of diet is the beginning of bowel diseases." In the book of Ben Sira it is written concerning the passage (Pr. 15, 15) All the days of the poor eve evil. Behold there are the Sabbaths and other festivals [upon which even a poor enjoys]? This refers to what Samuel said, that a change of diet is the beginning of bowel diseases. Ben Sira says: "Also the nights [of the poor are evil;] for his roof is usually lower than others; and his vineyard is usually on the top of the mountain, thus the rain from all other roofs falls on his, and the ground of his vineyard flows down to those below."