We create meaning and provide ourselves purpose, if this is enough to live a full life then what does it matter if there is meaning or not. Live in accordance with what feels right and benefits positively to oneself and those around them. You are here whether a higher power spawned us or not so we may as well live a full life and whatever happens after is to experience in due time when it comes. Maybe all who have passed away have obtained all the knowledge in the universe, or maybe eternal sleep in dark abyss is where our soul may one day lay, who knows, we are only human, what we do know is we are here now and we have some sort of clue as to what we can achieve and our limitless potential, so smash it, enjoy your life, whether in the great scheme of things it matters or it does not.