The fear comes to many people because you go back into a world to which you have always belonged and now you don't belong to it anymore. So you are going to a foreign country, as a stranger, to people who think that they know you. Now you know that they don't, but they will take it for granted that they know you. They will go on making contacts with your past, not with you. They will expect you to behave the way they think you should have behave, and you cannot behave that way. This whole situation creates a fear.
Fear is always felt at the stomach or at the throat. If it is felt at the stomach it has a certain quality.
If it is felt at the throat, it has a totally different quality. The fear that is felt at the throat is the fear of communication. It will be difficult for you now to communicate with people. When the fear is felt at the stomach it is fear of death.
If you go deep in meditation, the fear of death arises and that is felt just below the navel centre, at the hara, the death centre. If you are going to communicate, the fear will be felt at the throat because the throat is the centre of expression, communication, relating. When fear arises in relationship to love, it is at the throat, because the child receives love for the first time from the mother through the throat centre. That is his first contact with the world. Mother's breast is his first contact, first relationship, and that is through the throat centre. That's why Freudians call small children 'oral'. That is the oral state of their mind. Whenever you are getting something or giving something, it passes through the throat centre.
-Rajneesh