When God first created man and woman, they were created in perfect innocence and justice. However tempted by Satan, Adam and Eve forsook their loving relationship with God in deference to selfishness and lack of trust in the Creator.CC293…We do know by Revelation that Adam had received original holiness and justice not for himself alone, but for all human nature. By yielding to the tempter, Adam and Eve committed a personal sin, but this sin affected the human nature that they would then transmit in a fallen state.294 I
The first sin of disobedience resulted in injury to the spiritual nature of humankind. Hence, the original sin attributed to our first parents wounded the nature of our first parents and their progeny.
Therefore the Church teaches we inherit our spiritual nature from our parents that is it pre-exists from the time of Adam** and is transmitted through them in a fallen state.
Our soul on the other hand is I believe the essence of who we are personally, that is the immaterial aspect or essence of a human being, that which confers individuality and humanity, often considered to be synonymous with the mind or the self ***and which come into existence at the time of conception. ***
Brian Ingram