The most important thing is being passionate about what you're doing and always give it your all. That is the key to success.

This quote is suggesting that if you are passionate about something and put 100% of your energy into it, you will have success. It means that if you have enthusiasm and dedication, your hard work and dedication will pay off. This means that you should be determined and committed to what you are doing and be willing to devote your full effort and attention to the task. If you do this, you can expect to be successful.