Swami Sivananda: “…I shall speak a word on conscience. Some people say, “We can find out good and evil, right and wrong, by consulting our conscience only.” No individual will be able to do this by consulting his conscience only. It may give some clue and help, but in difficult and trying conditions, it will not help one. Conscience is not an infallible guide. The conscience of a man changes according to the experiences and education he has had. Conscience is one’s intellectual conviction only. The conscience of the individual speaks in accordance with his own tendencies, proclivities, inclinations, education, habits and passions. The conscience of a savage speaks a language that is entirely different from that of a civilised European.
“The conscience of an African Negro speaks a language that is vastly different from that of an ethically developed Yogi of India. Ask a clerk at the collectorate, “What are your duties?” He will say, “I must earn money and support my family and parents. I must not injure others. I must read the Ramayana.” He has not the least idea of the laws of Nature. If you ask him, “What are your duties to the country and humanity? What are right and wrong? What are good and evil?” he will simply blink. Ask any vehicle driver, “What is your duty?” He will say, “I must anyhow earn Rs. 20 daily. I have to purchase ten gallons of fuel, tyres, tubes and crude oil. The tyres are very costly. I have six daughters and five sons. I have to take care of them.” If you ask him anything about God, about moral virtues, liberation, bondage and freedom, about right and wrong, he will be bewildered.
“Why is there so much divergence between the promptings of conscience of two persons of the same caste, religion and creed? Why do we find ten different convictions among ten persons of the same district and the same community? The voice of conscience alone is not sufficient to guide man in understanding the law of God, about right and wrong, good and evil and other duties of life. The Shastras and realised persons only can truly guide a man in the discharge of his duties in an efficient manner.
“Dear friend, do your duties in a satisfactory manner. Consult the Shastras and the Mahatmas whenever you are in doubt. As you have not the ability or the time to think of the moral principles and rules given in the scriptures, you can get the moral precepts or instructions from the sages and saints and follow them to the very letter. Evolve. Expand. Grow. Develop and realise the Satchidananda Atma.”
(pgs. 27-28, “Kingly Science, Kingly Secret”)