Darjeeling, India, 1983.
In short, you cannot. India is too diverse to explain, or even describe, in any meaningful way. So understanding it is a journey, at least lifelong if not eternal. But you should try. And we are dedicated to all kinds of attempts, including via journey; this book, published recently by Phaidon, may help with visual clues prior to such a journey, whether it will be your first or 80th:
The brilliant American Magnum photographer Steve McCurry has travelled so widely, he could have produced a great monograph on almost any continent. Yet, in his latest Phaidon publication, he has chosen to focus on the country that he first visited as a 28-year-old photojournalist in 1978, and has since returned to over eighty times.
Organikos 