Working hard VS Gift by the Blessing

Unless the Lord builds a house,
its builders labor over it in vain;
unless the Lord watches over a city,
the watchman stays alert in vain.
In vain you get up early and stay up late,
working hard to have enough food —
yes, He gives sleep to the one He loves.

^{Psalm 127:1-2}

…we have not received the spirit of the world,
but the Spirit who comes from God,
so that we may understand
what has been freely given to us by God.

^{1Cor 2:12}