The click event is working, but the following code only runs one time:
var theQuoteAndAuthor = quotesArray[Math.floor(Math.random() * 25)]
var theQuote = theQuoteAndAuthor;
var theAuthor = theQuoteAndAuthor;
Move this inside your getRandomQuote function, so it will run each time the button is clicked. Also, the proper syntax for the addEventListener should be:
document.addEventListener("click", getRandomQuote); // without the () on the end. The function getRandomQuote will run, because it is a callback function that gets called after the click event.