Passion is like bookends to process.
Passion starts things. It inspires us to start a business, take classes or take risks. But without some learning, some structure or some process, that passion can quickly run out of steam or find itself fueling a futile exercise.
Process is what helps us get good at what we're passionate about. It gives us expertise and credibility. It is what gives us the intellectual capacity to solve problems and make advancements. However, if we get stuck in the process, though we can get good at what we do, we can never be great.
Greatness always requires passion.