People lose their conscience if they veer off of the right path by committing a very immoral act. Unfortunately, they lose part of their mental faculties with it too, so they can't see they're not on the right path anymore while acting as if everything is normal.

What does it mean when you lose your conscience?

Loss of consciousness occurs when the brain is no longer aware of one's surroundings, and so the body stops reacting to the world around it.

Can a person lose his conscience?

A person may become temporarily unconscious, or faint, when sudden changes occur within the body. Common causes of temporary unconsciousness include: low blood sugar. ... syncope, or the loss of consciousness due to lack of blood flow to the brain.