The Origin of the Universe

The universe is commonly defined as the totality of everything that exists. But my question is did we know where the universe from?
As far back as recorded history goes, there have been two sets of opposing ideas, beliefs, theories, or teachings about the origin of the universe.
It has either existed eternally with no beginning or end, or it was created at some point in time and will eventually come to an end.

According to religious belief that universe was created by GOD. But because that man did not contented with this belief,man explore and discover or search about it.This is the reason that theories about universe came up.

By far the most popular theory in science today is the big bang theory, the idea that the universe came into existence at a certain point in time roughly 15 to 20 billion years ago. In the last 25 years this theory has moved to the forefront of cosmology.
Current interpretations of astronomical observations indicate that the age of the universe is 13.75 ± 0.17 billion years,and that the diameter of the observable universe is at least 93 billion light years or 8.80×1026 meters.According to general relativity, space can expand faster than the speed of light, although we can view only a small portion of the universe due to the limitation imposed by light speed. Since we cannot observe space beyond the limitations of light (or any electromagnetic radiation), it is uncertain whether the size of the universe is finite or infinite.
Now we know about the universe.But We must bear in mind that all of this depend on us.On what we believe and to whom we believe.