Why did God make His promise to the seed of Abraham?

Answer

"Because that Abraham obeyed My voice, and kept My charge, My commandments, My statutes, and My
laws." Gen. 26: 5.
NOTE - Then God's commandments and laws existed in the time of Abraham.

What indwelling Power keeps such from sinning?
How is sin defined?
How, then, did the Lord prove the people (verse 4) whether they would keep His law, or not?
Did Christ's followers keep the Sabbath after His death?
What does He say He will bring with Him when He comes?
How is this great and dreadful day described in this same prophecy?
What peaceful condition will prevail in the earth made new?

Questions & Answers are from the book Bible Readings for the Home Circle