Are you committed to the paycheck or the project? Here's a guy that loved what he was working on... A LOT!

Still, the threat of being caught was real. Avitzur became adept at slipping into bathrooms and turning quickly down halls when he saw people from the facilities department or the woman who’d canceled his badge walking his way. Yet somehow the work got done.

By November, Avitzur and Robbins were ready to demonstrate the calculator. Engineers who had assisted the pair spread word of the project to their managers, who called Avitzur and Robbins in for a demo. Avitzur was prepared for the worst—ready to be dismissed as a loose cannon who had spent the last three months trespassing—but the demo went perfectly. When the computer came out the next year, Avitzur and Robbins’s graphing calculator program was on it. It has been loaded on more than 20 million machines in the decades since.

via mentalfloss.com