"Nunca he participado físicamente en una revolución."

Simplified Meaning:

The person is saying they have never been directly involved in a major change or fight to change how things work in society. For example, think about big events in history like the civil rights movement in the 1960s. People marched, protested, and fought against unfair laws and treatment. The person in the quote has never done anything like that themselves. Imagine watching a news story about people protesting for better climate policies. These protesters are taking part in a movement to push for change. This person, however, might only support these ideas in their mind or through social media but not actually participate in the protests or activities. Even if someone doesn't physically join such events, they can still make a difference by spreading awareness, voting, or changing their daily habits to align with the cause. You don't always have to be on the front lines to help make change happen. They might read books, learn about the issues, and talk to others, which is another way to support and understand revolutions without being directly involved.