The Declaration of Independence claims

The Declaration of Independence claims, “We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.” However, C.S. Lewis declares that https://canvas.northwestern.edu/courses/107827/files/7893378/download?wrap=1 Do we deserve to be happy? What is the distinction between pursuit, right, and deserving?