Sleep with dogs and you will end up with fleas. You will never soar like an eagle if you’re hanging around a bunch of turkeys and chickens. Come on now! People, places, and things have the capacity to keep you where you’re at, bring you down, or lift you up. It is important to surround yourself with positive, successful people—people of affluence—so that you will be inspired and lifted up to see, be, and accomplish more. Successful influences will rub off on you creating more success and affluence in your life.(Location 168 - Kindle version)
The author has named this concept of seeping through the positivity or negativity of one's associates into one's self as 'Osmosis by Association'. This has been said by many philosophers and religious leaders too, to be associated with either superiors or peers, but never with inferiors (this is totally based on spirituality, knowledge and ideas but not with anything like money, cast or social status).
I personally agree with this. Your friends can be a big factor in determining your future. But I have always thought how this can happen in both ways, benefiting both sides of the relationship. Just think I befriend with a spiritually superior one. In return he is getting associated with someone inferior to him. So this relationship will have a negative impact on him while I get all the positive impact. Do you see this as I see or did I miss something? What do you think about this concept of Osmosis by Association?
– William James