if you're not doing it for God then it will never work 

Psalm 127:1-2 | New International Version
1 Unless the Lord builds the house,
the builders labor in vain.
Unless the Lord watches over the city,
the guards stand watch in vain.
2 In vain you rise early
and stay up late,
toiling for food to eat-
for he grants sleep to[a] those he loves.