Satyarth Prakash (Hindi: सत्यार्थ प्रकाश, Satyārth Prakāś – The Light of Truth) is an 1875 book written originally in Hindi by Dayanand Saraswati (Swami Dayanand), a religious and social reformer and the founder of Arya Samaj.
The major portion of the book is dedicated to laying down the reformist advocacy of Swami Dayanand with the last four chapters making a case for comparative study of different religious faiths.
During the Middle Ages of Indian history, many faiths and sects sprang up in religious and social spheres of Hindu society.
Their practitioners slowly migrated away from the teachings of the Vedas attaching greater significance to their founders and their preachings.
[citation needed] The caste system based on birth became strong and gave rise to further fragmentation.
It was at this time that Swami Dayanand wrote Satyarth Prakash in order to spread the knowledge of the Vedas.
Jiva or Individual Eternal Souls who are different from one another yet have the same characteristics and can reach the same level of Happiness in the state of Moksha or Liberation (explained below in another paragraph).
They are bodiless hence beyond all genders and all other characteristics as seen in the World, they are not made out of materials of Nature, and they are subtler than the Nature itself, but take birth through body as per the creative principles set by the Supreme Lord based on their past Karma and they put effort to improve themselves.
Since this period of Moksha or Liberation is extremely long, it appears as though they never return or they never take birth again by the other beings who are still in the World.
Lord's chief characteristics being - Sat, Chit and Ananda i.e., "Exists", has "Supreme Consciousness" and is "Eternally Blissful".
The Lord is the eternal truth itself and the very giver of bliss enjoyed by the individual souls.
Since the Lord is bodiless and hence beyond all genders, the Vedas address it as Father, Mother, Friend, Cause of the Worlds, Maker etc...
It is Infinite and is the subtlest entity which is subtler than Nature and all the other conscious individual souls.
So, the Lord is the subtlest pervader of the all Space, beyond time, eternally blissful and knower of all.
After the period of Moksha, they pass on to this World again, in support of which, he quotes Veda Mantras and Mundakopanishad, in his book Satyarth Prakash and Rigvedadi Bhashya Bhumika Some of the 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 critical analysis of different religious beliefs and other religions in the World in the light of the Vedas, for the strengthening of society, eradication of superstitions, false notions and meaningless customs, shunning narrow-mindedness and promoting the brotherhood of man.
Navlakha Mahal is presently the office of Shrimadd Dayanand Satyarth Prakash Nyas, which after detecting in 2004 that the book has been printed by many unauthorised entities in different versions, appointed an authentication committee of Vedic scholars, and started to publish authenticated version of the book.
1905 S. Rangaswami Iyengar praised the book, saying that "It contains the wholly rationalistic view of the Vedic religion.
[18] However, the court dismissed the petition and commented "A suit by Hindus against the Quran or by Muslims against Gita or Satyarth Prakash claiming relief...are in fact, meant to play mischief in the society.