Ellen G. White's estate compiles quotes that imply that God wants people to be vegetarians.
Shall we use flesh foods?
Preparation for Christ’s Coming—God’s Design in Food Reform
Again and again I have been shown that God is trying to lead us back, step by step, to His original design—that man should subsist upon the natural products of the earth. Among those who are waiting for the coming of the Lord, meat eating will eventually be done away; flesh will cease to form a part of their diet. We should ever keep this end in view, and endeavor to work steadily toward it.
—Counsels on Health, 450.
Flesh Foods and Clear Thinking
God wants the perceptive faculties of His people to be clear and capable of hard work. But if you are living on a flesh diet, you need not expect that your mind will be fruitful. The thoughts must be cleansed; then the blessing of God will rest upon his people.... We want them to understand that the flesh of animals is not the proper food for them to eat. Such a diet cultivates the animal passions in them and in their children. God wants us to educate our children in right habits of eating, dressing, and working.
—Counsels on Dint and Foods, pp. 339, 390-391.
Choose the Best Foods
In order to know what are the best foods, we must study God’s original plan for man’s diet. He who created man and who understands his needs appointed Adam his food.... Grains, fruits, nuts, and vegetables constitute the diet chosen for us by our Creator.
—The Ministry of Healing, 295, 296.
Meat is not essential for health or strength, else the Lord made a mistake when He provided food for Adam and Eve before their fall. All the elements of nutrition are contained in the fruits, vegetables, and grains.
—Counsels on Diet and Foods, 395.
Why Use Secondhand Food?
Those who eat flesh are but eating grains and vegetables at second hand; for the animal receives from these things the nutrition that produces growth. The life that was in the grains and vegetables passes into the eater. We receive it by eating the flesh of the animal. How much better to get it direct, by eating the food that God provided for our use!—The Ministry of Healing, 313.
Few Animals Free From Disease
The meat diet is the serious question. Shall human beings live on the flesh of dead animals? The answer, from the light that God has given is, No, decidedly No. Health reform institutions should educate on this question. Physicians who claim to understand the  human organism ought not to encourage their patients to subsist on the flesh of dead animals. They should point out the increase of disease in the animal kingdom. The testimony of examiners is that very few animals are free from disease.
—Counsels on Diet and Foods, 388.
Entire System Corrupted
I have felt urged by the Spirit of God to set before several the fact that their suffering and ill health was caused by a disregard of the light given them upon health reform. I have shown them that their meat diet, which was supposed to be essential, was not necessary, and that, as they were composed of what they ate, brain, bone, and muscle were in an unwholesome condition, because they lived on the flesh of dead animals; that their blood was being corrupted by this improper diet; that the flesh which they ate was diseased, and their entire system was becoming gross and corrupted.
—Counsels on Diet and Foods, 387.
God is Bringing His People Back
Again and again I have been shown that God is bringing His people back to His original design, that is, not to subsist on the flesh of dead animals. He would have us teach people a better way.... If meat is discarded, if the taste is not educated in that direction, if a liking for fruits and grains is encouraged, it will soon be as God in the beginning designed it should be. No meat will be used by His people.
—Counsels on Diet and Foods, 82.
Compiled by Request
By Ellen G. White Estate
General Conference of Seventh-day Adventists
Washington, D. C.
October 5, 1960