Satyarth Prakash (Hindi: सत्यार्थ प्रकाश, Satyārth′ prakāś′ – “The Light of Meaning of the Truth” or The Light of Truth) is a 1875 book written originally in Hindi by Maharishi Dayanand Saraswati, a renowned religious and social reformer and the founder of Arya Samaj. It is considered one of his major scholarly works. The book was subsequently revised by Swami Dayanand Saraswathy in 1882 and has now been translated into more than 20 languages including Sanskrit and several foreign languages like English, French, German, Swahili, Arabic and Chinese. The major portion of the book is dedicated to laying down the reformist advocacy of {Swami Dayanand} with the last three chapters making a case for comparative study of different religious faiths. Satyarth Prakash in order to spread the knowledge of the Vedas and to educate people on the true qualities of God. The Satyarth Prakash contains exposition and clarifications of Vedic principles. The book advocates Vedic monism based on Advaita Vedanta. Some of the important topics in the Satyarth Prakash include worship of one God, explanation of the main principles of the Vedas, the relationship between religion and science and between devotion and intellect, elimination of the caste system and of different religious beliefs for the strengthening of society, eradication of superstitions, false notions and meaningless customs, shunning narrow-mindedness and promoting the brotherhood of man.