Ethical behavior?

In the following article I put forth my concerns and views regarding God, religion and human behavior.


Theism:
Belief in the existence of deities, at least one.

Atheism:
It is contrasted with theism. According to the site Wikipedia, atheism is, in a broad sense, the rejection of belief in the existence of deities.

Religion:
As per my knowledge religion is a collection of cultural and belief systems which defines the way of life aiming at tranquility and serenity as well as harmony among the inhabitants of a community. It establishes a relation between humanity and moral values.

It is obvious that there is a connection between religion and economic and social behavior. It performed important social functions in the transmission of ethical values between generations to form a society that maintains good social order.

What are my concerns?
I tend to be skeptical of supernatural claims, inconsistent revelations and in the belief of existence of God.

I believe in Jesus, Ram, Mohammed, Budhha etc.,(whom the sacred books address as Gods) but as great human beings who led an inspiring and principled life and taught others how to lead one. It seems to me that the rich imagination of human beings is the cause of their representation as deities which defined present religious systems.

What drives a person to behave ethically in this system is the fear of god or to gain place in heaven or simply because it is said.

If this is the case, Is this a true ethical behavior?

Do I believe in the existence of god?
I just don't care about the existence of god. I consider myself to be agnostic regarding the same.

What do I believe in?
I strongly support and believe in atheism as I opine that it favors humanity as the absolute source of ethics and values and permits individual to resolve moral problems without resorting to God.

I conclude this by an assertion(among many) of philosophers Susan Neiman and Julian Baggini that "behaving ethically only because of divine mandate is not true ethical behavior but merely blind obedience".