Genesis 26

"Then the Lord appeared to him and said: “Do not go down to Egypt; live in the land of which I shall tell you...So Isaac dwelt in Gerar. And the men of the place asked about his wife. And he said, “She is my sister”; for he was afraid to say, “She is my wife,” because he thought, “lest the men of the place kill me for Rebekah, because she is beautiful to behold.” vv.2,6-7

Read chapter 26.
This is the first record we see of God appearing to Isaac.  He'd probably grown up knowing and learning God's promises and covenant with his father Abraham.  It is interesting to see that the Lord spoke to his wife Rebekah before when she was pregnant (25:23).  This was a time/dispensation when God was openly acting and speaking, unlike today.
This chapter seems very familiar in that it is the same thing that happened to Abraham and a different Abimelech (name meaning "king" or "ruler") where they each lied about their wife being their sister out of fear.  Ways of a father are passed down to a son sen it it's not something the father taught him.  Isaac's lying is even worse in that Rebekah was a distant cousin where Sarah technically was Abrahams' sister (half sister, see 20:12).  If we don't learn from history we'll fall to the same mistakes that could've been avoided.  What innate characteristics do you see in yourself passed down from your parents?  What are some mistakes that you want to remember and learn from to not be repeated?