I'll be succint.
There are three most potent ways in which beliefs are transferred that I know of.
"Show me your friend, and I will show you your character"
The people you associate with will elicit certain values (thus, actions) from you. This is because whenever you exist among a pack, certain values and actions are required of you in order to be able to survive within that group and gain acceptance by it's members.
To survive and gain acceptance among a group of millionaires, you'd probably have to push yourself to make more money in order to gain their acceptance and survive long-term as a member of that group. This of course, depends on nuances such as whether or not this is a group that is nurturing and inspires you to achieve or not.
A shy guy among fun, center-of-attention type friends, will either leave their company or at least partly become more socially competent - especially if that group of friends present a nurturing, motivational environment.
Careful what friends you choose - even acquaintances you're in constant communication with will impact your life more than you know - because the more repetitively you are bombarded by their thoughts and actions, the more like you are to either:
* become like them OR
* become so repulsed by their beliefs and actions, you avoid their company
2. Mentors & Authority Figures
To receive guidance from a mentor or authority figure you often temporarily hand power over to them; any authority be it a pastor, teacher, doctor, lawyer or even the anchor on TV.
In your temporary handing over of power, the communication between you and this authority figure takes on the basic essence of hypnosis - which is why people often take misinformed action (against their better judgement) based on the advice of so-called experts.
In your momentary handing over of power, this authority figure is at liberty to impart any belief/knowledge to you - this is the blessing and the curse.
A good mentor, will leverage your momentary transference of power to to impart upon you an empowering belief. Not take advantage of it to brainwash you into doing or believing in something which you shouldn't.
You think you cannot perform a 360 tornado kick, but you truly believe you senseii knows best and so you surrender to his belief that you can do it. You thus become more receptive of his teaching, suspending your disbelief and inheriting his empowering teaching - you do what he says and it works (albeit after a bit of practice). Now your mind has received validation, you believe what he says even more and it goes on. So you break your limits and acquire those of your master - he also has a limit.
When you reach it, he may be able to help you achieve what he could or he will send you on your way to someone who can help you achieve more - this is a good master.
This is an example of a good mentor. There are however unscrupulous people masquerading as benevolent persons - be careful always and critically analyse everything you receive from a mentor. This is the prudent way.
"Reward (pleasure) and punishment (pain) are more powerful tools than any chain or leash"
I can't go into this a whole lot, but basically it's this - people treat you how you've conditioned them, and you treat people how they've conditioned you.
Example: If I consistently tell you to **** off every time you say "hello", you probably won't talk to me again. However if I consistently engage you in a meaningful, fun, enjoyable conversation anytime you say "Hi" plus reward you even further by checking in from time to tim, you will probably always want to be in my company.
If you don't get it still, please re-read or get one of Goleman or Tony Robbins' books.
Be careful what conditioning you get from friends, mentors and life itself. You need a power tool called perspective; it determines what actions you take as it determines what interpretation you give to actions towards you (pain or pleasure, reward or punishment)
These aren't new ideas. I just thought it might serve well as a reminder in choosing wisely what environments, friends and beliefs we allow ourselves to be conditioned by.