It's not selfish, it's necessary.
When you are doing it for selfish reasons, sure it may be selfish.
But when you are doing it to refuel, restore and renew so you can continue living for God and your purpose and pouring into others, it's not selfish.
It's totally necessary to do what you were made to do WELL without burning out and wearing yourself out in the process.
What are you doing today for YOURSELF to refuel, restore and renew?