Some Christians know what an individual soul is. Other Christians do not know this.
Since God loved us so very dearly that he chose to send his only Son to die on the cross to save our souls from death, it is most important to know about the human soul with all certainty. Doesn’t this make us unique and different from all creatures like animals?
The soul of each person is the pearl of great price for which God gave up His all – His precious Son— to redeem our lives, i.e., to save our souls. You can read about the pearl of great price in Matthew 13:45-46 (Again, the kingdom of heaven is like a merchant seeking beautiful pearls, who, when he had found one pearl of great price, went and sold all that he had and bought it.) Here, the soul of the individual is the pearl of great price. All that God had was God’s begotten Son, Jesus Christ, whom He gave up to die on the cross – the supreme sacrifice – so that the individual soul is saved.
