Hinduism has never produced an exclusive, dominant, orthodox sect, with a formula of faith to be professed or rejected under pain of damnation. - Vincent Arthur Smith

The Greek influence never penetrated deeply into the Indic civilization... On the other hand, the West learned something from India in consequence of the communications opened up by Alexander's adventure. Our knowledge of the facts is so scanty and fragmentary that it is difficult to make positive assertions with confidence, but it is safe to say that the influence of Buddhist ideas on Christian doctrine may be traced in the Gnostic forms of Christianity, if not elsewhere. The notions of Indian philosophy and religion which filtered into the Roman empire flowed through channels opened by Alexander.

India ... beyond all doubt possesses a deep underlying fundamental unity, far more profound that that produced either by geographical isolation or by political suzerainty. That unity transcends the innumerable diversities of blood, color, language, dress, manners and sect.

Muhammad ibn Tughlaq “led forth his army to ravage Hindostan. He laid the country waste from Kanauj to Dalmau [on the Ganges, in the Rai Baréli District, Oudh], and every person that fell into his hands he slew. Many of the inhabitants fled and took refuge in the jungles, but the Sultan had the jungles surrounded, and every individual that was captured was killed.”