100% Garentee Your Life Will Improve

What other book can garentee that following it's instructions will 100% change your life for the better? Besides the fact that it offers everlasting life, it will also improve your life on this earth. I don't know a single person who has ever said that they regretted giving thier life and trust to Jesus. It's the most important choice you will ever make to accept him as your Lord and Savior, but if you try to whole heartedly follow him and follow his instructions in the Bible, it will improve your life in every way. I wish I had earlier in life.