Is it a coincidence?

Some people think it is always a coincidence.
And they say that they believe only in science.
It is a contradiction.
Science makes it clear that there is a cause, and there is a result.
There is no result without cause.
I would like to ask a scientist how to explain coincidence.

If we think that there is meaning for everything happening, our life is more interesting.

If we are happy, there is a reason.
If we are sad, there is a reason.

If we think that way, we can control or decide our lives with our mind.

~Peace Maker