Hassidout sur L’Ecclésiaste 1:18

כִּ֛י בְּרֹ֥ב חָכְמָ֖ה רָב־כָּ֑עַס וְיוֹסִ֥יף דַּ֖עַת יוֹסִ֥יף מַכְאֽוֹב׃

car, abondance de sagesse, abondance de chagrin, et accroître sa science, c’est accroître sa peine.

The Gate of Unity

Moreover, whoever does not have Da’at is cruel, such as children, or the like. [However], the more one increases his Da’at,28Ecclesiastes 1:18 the more will he feel merciful.