During the social religious reform movement in India, many new religious society were started. This happened especially after the First Indian Independence War (also known as Sepoy Mutiny). People started to think about the time when the British would leave India, which group would then be the new ruler of India? The people who called themselves Hindus were in majority but they were challenged by Muslims and Christians. Then to appease them, these samajas - like brahma samaj,arya samaj etc were started and they propogated many concocted theories and practices. These were misleading the true religious aspirants .

To save such sincere aspirants from these misdirections created by these samajas, Srila Bhaktivinode Thakur wrote many articles in his Sajjana Tosani magazine at that time. These articles were then collected together in the form of a book - "Prema Pradipa".

This book explains all the philosopical concepts about true religion. It reveals the misunderstandings of these samaj theories. 

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The Arya Samaj was one of the movements founded during the late 1800s that attempted to modernize Hinduism. The Samaj attempted to answer the Orientalists (Christian missionary scholars) who had trashed Hinduismand its scripture in India. Ironically,in attempting to defend Hinduism, the Samaj compromised and presented a Christianized form of Hinduism. While accepting the statesman and preacher Krishna of the Gita, they rejected the playboy Krishna of Vraja, whom they could not understand themselves, much less explain to Christian missionaries. Thus they utterly hated the Bhagavatam. Even Bhaktivinoda Thakura said that he was initially prejudiced by a negative impression of the Bhagavatam, but upon his own investigation this negative impression was transformed into love for the text. It is his love for the Bhagavatam that has prevailed to this day an—through his successors—given literary and spiritual credence to the text in both religious and academic quarters of the 21st century.

Arya Samaj scholars "demonstrate" how each Purana is propaganda for a particular deity and how in each a different deity is declared supreme. They also "show" how the stories of creation found in various Puranas thoroughly contradict each other. They say that the Puranas were written by unscrupulous people whose aim was to suppress people. They claim that only the Vedas and Upanishads are of Vyasa and all the rest is mumbo-jumbo. They also declare all avataras as concoctions and say that the Vedas mention nothing of avataras or that God has or ever takes form.

In simple words we know that Absolute Knowlege is that which is given by Bhagavan and descending through the 4 bonafide sampradayas - Sri, Rudra, Brahma & Kumara and those outside these bonafide line cannot have the true knowledge about the Absolute. Thus we can easily identify and reject their theories.

We know all that Srila Prabupada has taught us is based on Bhagavad Gita As It Is (spoken by the Supreme Personality of Godhead Himself),  Srimad Bhagavatam by Srila Vyasadeva (incarnation of the Supreme Personality of Godhead) so our process is bonafine. Not just better than Arya Samaj but it is the true practise of the soul (jiva's nitya dharma).