Muscular strength and vigorous health do not depend on animal food, as grains, fruits, nuts, and vegetables provide all necessary nutrients.

Original passage

It is a mistake to suppose that muscular strength depends on the use of animal food. The needs of the system can be better supplied, and more vigorous health can be enjoyed, without its use. The grains, with fruits, nuts, and vegetables, contain all the nutritive properties necessary to make good blood. These elements are not so well or so fully supplied by a flesh diet. Had the use of flesh been essential to health and strength, animal food would have been included in the diet appointed man in the beginning.