There is a growing subculture of barefoot runners, people who got rid of their shoes. And what they have found uniformly is you get rid of the shoes, you get rid of the stress, you get rid of the injuries and the ailments.
The source of their motivation ranges from what you might expect - from the seeking of money and publicity, to those who genuinely suffer from chronic personal problems and have fixated on me as the cause of their frustrations and failures.
I've heard people on panels say, 'You must have a Web site. You need to tweet. Repeat the title of your book constantly,' and I just want to say, 'Shut up. Everything you're saying is wrong.' People will know instantly if your only motivation for tweeting is to sell books.
Einstein comes along and says, space and time can warp and curve, that's what gravity is. Now string theory comes along and says, yes, gravity, quantum mechanics, electromagnetism - all together in one package, but only if the universe has more dimensions than the ones that we see.
If you help others with sincere motivation and sincere concern, that will bring you more fortune, more friends, more smiles, and more success. If you forget about others' rights and neglect others' welfare, ultimately you will be very lonely.