Seneca · On the corporeality of virtue
Letters 106.2
For you know that I am planning to cover the whole of moral philosophy and to settle all the problems which concern it. Therefore I hesitated whether to make you wait until the proper time came for this subject, or to pronounce judgment out of the logical order; but it seemed more kindly not to keep waiting one who comes from such a distance.
Seneca, Letters to Lucilius 106.2, translated by Richard Mott Gummere