Unless the Lord builds the house, they labor in vain who build it, unless the Lord guards the city, the watchman stays awake in vain. Psalm 127:1

If God is not in it, all your work will be for nothing, for your land will yield no crops, and your trees will bear no fruit. You will plant wheat but are harvesting thorns.  We can do nothing in our own strength; therefore, we should commit all our ways to the Lord for he is mercifully kind.