“Five years from now, you’re the same person except for the people you’ve met and the books you’ve read.”
“Five years from today, you will be the same person that you are today, except for the books you read and the people you meet.”
“You are the same today that you'll be five years from now except for two things: the people you meet and the books you read.”
“You will be the same person in five years as you are today except for the people you meet and the books you read.”
“You are the same today that you are going to be five years from now except for two things: the people with whom you associate and the books you read.”
“You're the same today as you'll be in five years except for the people you meet and the books you read.”