Do not let what you cannot do interfere with what you can do.

The maxim urges a shift from limitation-focused thinking to agency-focused action. Instead of expending energy on constraints—lack of resources, talent gaps, time, or circumstances—it counsels concentrating on the attainable tasks that move one forward. The line reflects a pragmatic, coach-like philosophy: progress is built from controllables (effort, preparation, attitude, small daily improvements) rather than from wishing away uncontrollables. It also implies that fixation on deficits can become a self-fulfilling obstacle, crowding out initiative. As guidance, it is both motivational and strategic: identify what is possible now, execute it well, and let accumulated competence reduce the impact of what currently cannot be done.

1) "Don't let what you cannot do interfere with what you can do."
2) "Never let what you can't do stop you from doing what you can."
3) "Do not let what you cannot do get in the way of what you can do."