A man of valor is one who is mighty of heart with perfect trust to perform mitzvot at all times and to meditate upon the Torah day and night, even though there is no food or clothing in his house, and his children and the members of his household cry out to him: Provide us with our support and maintenance. And he does not heed them at all, or listen to their cries.

Commentary on Mishlei 23:30, as cited in "Separation from the Worldly (Perishut)"