Musar zu Mischlej 12:28

I MUST preface, in treating of this quality, of what nature it is derived. I would hold that it is of the yellow-gall species. This quality appears usually when the soul is free from other blamable qualities and when it is not mingled with aught of grief, and most frequently it is (found) in pure and noble souls. It is a commendable quality, and man ought to make use of it in whatsoever work of art or science he be engrossed. Was it not said of him (Prov. xii. 27), "The substance of a wide-awake man is precious," which means that the most precious virtue of the lofty is wide-awakedness, both in the present and future life. In the world de generation et corruption, he is wide-awake in his quest of knowledge as well as goodness of service and faith, and in the attempt to attain to the world of intellect.