Moussar sur Les Psaumes 32:11

I hold that this quality is to be found in the souls of those, above all, who are free from defilement, the righteous, the pious, the pure, destined for the Heavenly Kingdom, rising to spirituality, i.e., the souls of the upright, for they are in perfect enjoyment of their condition of service and greatly rejoiced because of their worship, as it is written (Ps. xxxii. 11), "Be glad in the Lord and rejoice, ye righteous; and shout for joy, all ye that are upright in heart." The well-bred man ought not to indulge in laughter when seated in an assembly, for it was said that for him who laughs much, but little respect is felt. Facetiousness takes away the veil of dignity. Even as anxiety (apprehensiveness) when it is aroused gives rise to weeping, so gladness, when it is stirred, incites to laughter.

Furthermore, he alludes to the exercise of the qualities of prudency and modesty (id., xxxvii. 3), "So shalt thou dwell in the land and feed in faithfulness." His saying, first, "So shalt thou dwell in the land," and then "and feed in faithfulness," shows that long life on earth is the result of cultivating humility and prudency, which he calls "faith," as thou knowest from the saying (Num. xii. 7), "He is faithful in all my house," and that which preceded in the description of modesty. That which we have said of the meriting of life, even long life on earth, corresponds to the expression (Ps. xxxvii. 11), "The meek shall inherit the earth." In saying (id., 4), "Delight thyself also in the Lord," he alludes to the quality of joy, which the righteous exercises in that service of the Lord, wherein he delights. Thus he says elsewhere (Ps. xxxii. 11), "Be glad in the Lord and rejoice, O ye righteous"; again, he says of the season of gladsome tidings (Isa. Ixi. 10), "I will greatly rejoice in the Lord." In saying (Ps. xxxvii. 4), "He shall give thee the desires of thine heart," he alludes to the quality of yearning which is love, for God satisfies the yearning of the righteous, as is promised them in the saying (Ps. xx. 6), "The Lord will fulfill all thy desires."