People know when we do wrong or bad things. It's inherent and part of how God created humanity. I can prove this by my 18 month old Granddaughter! She has not had time learned a set of rules or do and don'ts but when something goes wrong she is the first to say Uh-oh!
God created us with morals and the ability to choose. It's up to us to choose to do good things and not bad. It proves God's existence. We find morals in all cultures and it proves that God is real. He created and loves us. His desire is to make our relationship the very best.
Why? Because He loves us. Have you made the choice to love Him?
Be wise today and always - choose the best - choose God.