Don't let the "Mathematical" part scare you off. The joy comes when the concepts click.
For those interested in learning more about mathematical statistics, there are many resources available online, including PDF books and articles. These resources provide an excellent introduction to the field and can be used to learn the key concepts and techniques.
The "infinite joy" comes from the realization that the same principles governing a coin toss also govern the movement of galaxies. A PDF allows you to hold that universality in your hands.
: The text was refined over 20 years to serve both statistics departments (where students may lack advanced math fluency) and mathematics departments (where students may lack statistical context). Amazon.com Other Notable Features Integrated Video Lectures : The book is uniquely paired with a YouTube channel called A Probability Space