"India is like a wave. Resist and you'll be knocked over; dive into it and you'll swim out the other side." It's a quote from the movie I watched on the flight over -- it's especially true for India, but it holds for travel more generally.
There is no substitute for travel. To completely immerse yourself in a culture completely unlike your own -- to taste the foods, hear the sounds, sleep in the guesthouses, meet the people, understand their way of life -- when done well, you gain a perspective on your own life that's impossible to achieve otherwise.
My four weeks in India were remarkable. I had little idea of what to expect and seemed to constantly be in a state of amazement, shock, amusement, disappointment, awe, or perplexity. Nepal tomorrow!