Why does humanity and animals suffer pain?

I suggest there must be a reason for suffering snd death.

Adam and Eve sinned, and from then on women were cursed with the pain for giving birth to human life. 

OK, the Bible says our prayers to God result in an heavenly incense.

So what kind of heavenly vessel collects the spiritual substance generated by pain on Earth?

What is this spiritual substance?

I have a few ideas but they can wait a moment.

It is said Sir Isaac Newton was also a spiritual alchemist.

Thanks

JDM