Letters from a Stoic 117 : 16
For I only wish to be a wise man in order to be wise. And what then? Is not that thing a Good without the possession of which a certain other thing cannot be a Good? You surely admit that wisdom, if given without the right to be used, is not to be welcomed! And wherein consists the use of wisdom? In being wise; that is its most valuable attribute; if you withdraw this, wisdom becomes superfluous. If processes of torture are evil, then being tortured is an evil – with this reservation, indeed, that if you take away the consequences, the former are not evil. Wisdom is a condition of "mind perfected," and being wise is the employment of this "mind perfected." How can the employment of that thing not be a Good, which without employment is not a Good?