Conscience is actually two words. “Con” which means “with”and “science” which means “knowledge”. So, this one word means “with knowledge” and it denotes an entire study of many scientists and other people.
Most people who deny God also want to deny the existence of a conscience because it doesn’t make much sense if we all evolved. How did we get a section of ourselves that can determine between good and bad if we are senseless primordial soup-remakes?
That is the very purpose of the conscience: to alert of us of what is bad and good. If you don’t have a good conscience running then there is something wrong that must be explored.
The conscience is the main way for a believer to evangelize through. This portal of sorts leads rights to the person’s soul and condemns them of sin. If the convertee was not condemned with sin what would be the purpose of Jesus payment for the fine of sins: death?
The most popular way to prick a person’s conscience is through the truth. When someone does not tell all the truth, the whole truth and nothing but the truth they are ultimately lying. This does not go lightly in God’s mind.
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death. (emphasis mine)
Lying is condemned in the ninth of the ten commandments given to the world through Moses. Even David saw the truth (no pun intended) of the ever-lying world.
I said in my haste, “All men are liars.”
How do humans overcome the liar’s doom of Hell?
I will take the cup of salvation, and call upon the name of the LORD.
This is the answer that needs to be proclaimed to all humanity for all of them are liars!