If religious beliefs and opinions are found contrary to the standards of science they are mere superstitions and imaginations.
Abdu'l-BaháA man may be a Bah' in name only. If he is a Bah' in reality, his deeds and actions will be decisive proofs of it. What are the requirements? Love for mankind, sincerity toward all, reflecting the oneness of the world of humanity, philanthropy, becoming enkindled with the fire of the love of God, attainment to the knowledge of God and that which is conducive to human welfare.
Abdu'l-BaháAnd now one of the greatest and most fundamental principles of the Cause of God is to shun and avoid entirely the Covenant-breakers, for they will utterly destroy the Cause of God, exterminate His Law and render of no account all efforts exerted in the past.
Abdu'l-BaháIllnesses which occur because of physical causes should be treated by doctors with medical remedies; those which are due to spiritual causes disappear through spiritual means. Thus an illness caused by affliction, fear, nervous impressions, will be healed more effectively by spiritual rather than physical treatment. Hence, both kinds of treatment should be followed; they are not contradictory.
Abdu'l-Bahá