Meaning is created partly by what you are willing to care about consistently.

Meaning is not entirely found, some of it is conferred by sustained attention. Caring about something consistently, over years, is what turns it into something that can hold significance, and things you care about intermittently never accumulate that weight. The consistency is the mechanism.

Pick one thing and stay with it past the point where the novelty ends. That persistence is what makes it matter, and it is largely a decision rather than a discovery.