Genesis 35:10 (ESV) … “And God said to him, ‘Your name is Jacob; no longer shall your name be called Jacob, but Israel shall be your name.’ So he called his name Israel.”
“And God appeared unto Jacob.” That was something new. He had spoken to Jacob about his standing in the patriarchal line, He had quickened his senses in a dream. But now God appeared unto him. On this occasion, God spoke to Jacob about his personal name (35:9–10), about his promised fame (35:11), and about his perpetual claim (35:12–13).
Poor, stumbling Jacob was still Israel. The Almighty God would see to it that nations and kings sprang from his seed, and the promised land was his despite all appearances to the contrary. Here were spiritual verities upon which Jacob could bank, verities unchanged by all that had happened since last he had come that way. They rested upon God’s unbreakable word, therefore they were unchanged. 
The lesson for us is that God’s promises for us are assured by His unbreakable word. What God has promised will be accomplished for, in and thorough His sovereign plan.