Life has to have some meaning in order for a person to retain his sanity.
We all need to feel necessary, recognized, appreciated, useful, (hopefully) loved ... and there has to be some reason why we keep working and doing our "thing".
For a religious person, the ultimate reason is "God's plan." I don't know what it would be for you but I'm sure there's some driving force inside of you which motivates you to live and enjoy life and SHARE yourself in some way with other life. Whatever that is .... it's YOUR god.