Read Job 24:14, 15. How do these verses help us understand what the standard of right and wrong included?

In these verses they talk about murder, lying , and adultery. God has a definitive standard for right or wrong which is righteousness. All unrighteousness is sin. The law of God is manifested in the character of the individual.

What is the pointed testimony about Abraham that God gives to Isaac about his father? Gen. 26:4, 5.

The testimony that was said about Abraham was that he kept the commandments of God. Abraham was a faithful man, while through his life he had some problems telling the truth in the end he passed his final test. The question is what will God have to say about us in the final analysis.

Clearly, the idea that there was no law until Sinai makes no sense in light of so much of what the Bible teaches about life before Sinai.

Prayer: Lord God Almighty,  help us to accept the truth of your word,in Jesus name amen.