Purpose

"And God said to him, “Your name is Jacob; your name shall not be called Jacob anymore, but
Israel shall be your name.” So He called his name Israel."

I find this story, along with Abram to Abraham's story as mirrors with different men. Remember, Abram's encounter with God and his obedient response changed this man. He was literally given a new name to identify himself. Instead of Abram, he would be called "Abraham" - the father of many nations.
Now, Jacob has the same encounter in chapter 32 of Genesis as he wrestles with the angel over his identity. He was blessed in that moment and given a new name.

However...here is the unique observation for both men. They had to be reminded of the change in their identity. Abraham is given the promise again in chapter 15...many years after the original promise. Jacob was reminded again as he returned to Bethel in chapter 25. God basically told him, "you aren't Jacob, you're Israel."

What is the struggle you and I have today? What encounter with the Lord do we need to be reminded of? Remember, one encounter with God changes everything!