[144] And the sacred scriptures teach us that this disposition is an insidious one; for when it perceives that the most vigorous portion of the power of the soul has passed over, then, "rising up from its ambuscade, it cuts to pieces the fatigued portion like a rearguard." [145] [146] [147] [148] And of fatigue there is one kind which easily succumbs through the weakness of its reason which is unable to support the labours, which are to be encountered in the cause of virtue, and so, like those who are surprised in the rearguard, it is easily overcome. But the other kind is willing to endure honourable toil, vigorously persevering in all good things, and not choosing to bear anything whatever that is bad, not even though it be ever so trifling, but rejecting it as though it were the heaviest of burdens.