Answer:
Soldiers generally have to endure more than the average person. They experience violence, tragedy, and death firsthand in the battlefield or in combat. Soldiers are often also known for being selfless and putting others first and trying to save others lives before their own. So to say "Soldier's Heart" means that someone is a hardened, but good person.
Ultimately, Roman polytheism was brought to an end with the adoption of Christianity as the official religion of the empire.
Answer:
I believe it was Lord William Bentinck