Man’s search for meaning. Most of the human population don’t search. And for a very good reason. Meaning for them is immediate, coming as it does from the struggle to survive.
Of those for whom survival is not a challenge, meaning is more elusive. Some find it by submitting to a belief system. Others, that prefer to think independently, have a more difficult time. As near as I can tell, it’s never found through any sort of introspection. If it comes at all it comes from work that has purpose.
The wife of a colleague has devoted her life to helping the deaf to hear through advanced medical technology. Take a look at the responses such people have when they first experience hearing. I can only imagine how meaningful it would feel to know that you gave this gift to someone.