“Behold, I am with you and will keep you wherever you go, and will bring you back to this land; for I will not leave you until I have done what I have promised you.” (v.15)
The words of this verse were extremely important for Jacob to hear. He was on his way to Syria, apparently to obtain a wife from his mother Rebekah's family in that place; but the real reason was because his twin brother, Esau, had sworn to kill him. And Jacob knew that Esau was the kind of man who could and would do it!
But now Jacob had heard the reassuring words, "Behold, I am with you" and knew that they were from God. Jacob was now receiving God's promise that he would not be killed by robbers, wild animals or his brother, during the two hundred mile trip he had embarked upon. Instead, God was with him and would bring him back to the very land of Canaan he was departing from. The land called "Canaan" would be his, just as it was his father's and grandfather's, but even more important, God would be with him.
And note that when God says, "I am with you and will keep you wherever you go," He is speaking not only to Jacob, but He is also reassuring you and I. He is with those who place their trust, and their faith in the Lord Jesus Christ.
The Truth: “But let all those rejoice who put their trust in You; Let them ever shout for joy, because You defend them; let those also who love Your name be joyful in You. For You, O Lord, will bless the righteous; with favor You will surround him as with a shield.” (Psalm 5:11-12)