Research in comparative religion has shown that the oldest, religious documents of ancient India point back to an Ur-Germanic age. - Jakob Wilhelm Hauer

So much at least is clear, that Indo-Arya remained extensively under the influence of northern blood and stands even today, albeit in pronounced admixture with non-Aryan elements.

India is universally held to be the land of quiet contemplation, escapist mysticism, dreaming passivity. But whoever knows India knows that this image is onesided. It is true that the Indo-Aryans, very early in their history, turned inward with an exceptional fervor. . . . [But] the urge toward contemplation and a turn away from the world is only one side of the Indo-Aryan essence. Complementing it in a polar tension is an extraordinary activism that worked itself out ever anew through the millennia in gladiatorial battles, and in the building of temples and riches. The powerful northern blood inheritance [nordische Bluterbe] of the Aryans who migrated into India roughly three millennia before Christ did not remain concealed in India.

Today, it is considered settled that the racial traits of the Indo-Aryans link them historically to that race which has had the definitive influence in the Indo-Germanic world, the northern [race].