When the juices of trees have no means of escape, they clot and rot in them, making the trees hollow and good for nothing.
Marcus Vitruvius PollioPytheos made a mistake by not observing that the arts are each composed of two things, the actual work and the theory of it. One of these, the doing of the work, is proper to men trained in the individual subject, while the other the theory is common to all scholars.
Marcus Vitruvius PollioFrom the exterior face of the wall towers must be projected, from which an approaching enemy may be annoyed by weapons, from the embrasures of those towers, right and left.
Marcus Vitruvius PollioFor we must not build temples according to the same rules to all gods alike, since the performance of the sacred rites varies with the various gods.
Marcus Vitruvius Pollio