If anyone would like to see a concise history of what humanity believed about the process of a human acquiring a soul, here's an article.

Note the commonality of belief that a soul enters within the womb, and often around the time of 40 days.
[link to en.wikipedia.org]

It's also called "quickening".

I'm a Christian and also educated and so I have beliefs. That doesn't mean they're true or false. Only Ultimate Reality knows Truth not me.

It is interesting, and I agree, "We are souls." We inhabit bodies. The essence of us is the soul.