Elon Musk was asked to give aspiring entrepreneurs some words of encouragement. His answer was seven words and it wasn't encouraging.
"If you need inspiring words, don't do it."
The interviewer laughed, waiting for the real answer. It didn't come. That was the answer.
He explained. Starting a company is years of pain with a high probability of failure. If your commitment requires external motivation, it will not survive contact with reality. The motivation has to be structural. You do it because the thing must exist and you can't live with not building it. Anyone who needs a speech to start will need a speech to continue, and there won't always be one available at 3am when the servers are down and the money is gone.
Look at his own record through that lens. No inspiring words made him put his last dollars into Tesla on Christmas Eve. Nobody gave a speech before the fourth rocket launch. The force that carried him through wasn't motivation. It was the inability to accept a world where the thing doesn't get built.
Motivation is weather. Mission is climate. Weather changes daily. Climate decides what grows.
The people asking for inspiration are asking the wrong question, and his answer was designed to filter them out. The ones who heard it and started anyway were the only ones who ever had a chance.