Musar sur Les Psaumes 1:3

And also in this world, his affairs will prosper, as Chazal have said (Avodah Zarah 19b): "Whoever occupies himself with Torah, his affairs prosper," as it is written (Psalms 1:2-3): 'but in the Torah of the L-rd is his desire,… and all that he does shall prosper.'"

The general rule of this matter is that a man should never be stubborn and he should not "make his neck stiff" against those who rebuke him or against one who tries to teach him the upright way — but he should very willingly listen to them, and accept their words with the graciousness of his soul, for concerning stubborn people it is said : "Thorns and snares are in the way of the froward; He that keepeth his soul holdeth himself far from them" (Prov. 22:5). And it is also said "He that hath a froward heart findeth no good" (Prov. 17:20). In several instances are praised those who willingly listen to the words of the Torah, as it is written "But his delight is in the law of the Lord; And in His law doth he meditate day and night" (Ps. 1:2). And it is written "And he shall be like a tree planted by streams of water, that bringeth forth its fruit in its season" (Ps. 1:3); and it is written : "Happy is the man that feareth the Lord, that delights in his conmmandments" (Ps. 112:1). Notice that it says "delights" which means that a man must train himself to delight to do the commandments.