[Testimonies for the Church 2:64, 65 (1868).]
The use of tea and coffee is also injurious to the system. To a certain extent, tea produces intoxication. It enters into the circulation and gradually impairs the energy of body and mind. It stimulates, excites, and quickens the motion of the living machinery, forcing it to unnatural action, and thus gives the tea drinker the impression that it is doing him great service, imparting to him strength. This is a mistake. Tea draws upon the strength of the nerves, and leaves them greatly weakened. When its influence is gone and the increased action caused by its use is abated, then what is the result? Languor and debility corresponding to the artificial vivacity the tea imparted. CH 87.1
When the system is already overtaxed and needs rest, the use of tea spurs up nature by stimulation to perform unwonted, unnatural action, and thereby lessens her power to perform, and her ability to endure; and her powers give out long before Heaven designed they should. Tea is poisonous to the system. Christians should let it alone. CH 87.2
The influence of coffee is in a degree the same as tea, but the effect upon the system is still worse. Its influence is exciting, and just in the degree that it elevates above par, it will exhaust and bring prostration below par. Tea and coffee drinkers carry the marks upon their faces. The skin becomes sallow and assumes a lifeless appearance. The glow of health is not seen upon the countenance. CH 87.3