"From there he went up to Beersheba. That night the Lord appeared to him and said, 'I am the God of your father Abraham. Do not be afraid, for I am with you; I will bless you and will increase the number of your descendants for the sake of my servant Abraham.' Isaac built an altar there and called on the name of the Lord. There he pitched his tent, and there his servants dug a well." NIV translation
Isaac had moved around searching for peace and finally the Lord appeared to him and blessed him. It is then that he put down roots and settled at Beersheba. We see that he was blessed because of the legacy of faith left by his father and must ask ourselves if we are leaving such a legacy for our children. We see this put into action as Isaac built an altar there which was something that Abraham had done many times.
"Meanwhile, Abimelek had come to him from Gerar, with Ahuzzath his personal adviser and Phicol the commander of his forces. Isaac asked them, 'Why have you come to me, since you were hostile to me and sent me away?' They answered, 'We saw clearly that the Lord was with you; so we said, "There ought to be a sworn agreement between us" - between us and you. Let us make a treaty with you that you will do us no harm, just as we did not harm you but always treated you well and sent you away peacefully. And now you are blessed by the Lord."' NIV translation
The same people that had sent him away came to Isaac and asked for a treaty. They had sent him away thinking that distance would be enough to protect them but now they realized just how blessed he was by God.
In the same manner, everything that God gives us should be used to glorify God. Our success in whatever we attempt can be an excellent way of provoking people to ask questions about our faith.
"Isaac then made a feast for them, and they ate and drank. Early the next morning the men swore an oath to each other. Then Isaac sent them on their way, and they went peacefully. That day Isaac's servants came and told him about the well they had dug. They said, 'We've found water!' He called it Shibah, and to this day the name of the town has been Beersheba." NIV translation
In the Beatitudes, Jesus said "Blessed are the peacemakers, for they will be called children of God." Isaac had agreed to live in peace and then was told that his servants had found water.
"When Esau was forty years old, he married Judith daughter of Beeri the Hittite, and also Basemath daughter of Elon the Hittite. They were a source of grief to Isaac and Rebekah." NIV translation
The Hittites were descendants of Canaan who were cursed by God (see Genesis 9). Although Isaac and Rebekah were blessed by God, Esau tried to marry into wealth and power as the Hittites had a great empire. Esau not only married one Hittite but even went so far as to marry two Hittite women. In effect, Esau was rejecting his heritage and chasing the flesh.