Psalm 127:1
“Trowel and hammer, saw and plane are instruments of vanity unless the Lord be the Master-builder”. Charles Spurgeon goes on to say: “Except the Lord keep the city, the watchman waketh but in vain.” Around the wall the sentinels pace with constant step; but yet the city is betrayed unless the unsleeping Watcher is with them. We are not safe because of watchmen if Jehovah refuses to watch over us. Even if the guards are wakeful, and do their duty, still the place may be surprised if God be not there. “I, the Lord, do keep it,” is better than an army of sleepless guards. Note that the Psalmist does not bid the builder cease from labouring, nor suggest that watchmen should neglect their duty, nor that men should show their trust in God by doing nothing: nay, he supposes that they will do all that they can do, and then he forbids their fixing their trust in what they have done, and assures them that all creature effort will be in vain unless the Creator puts forth his power, to render second causes effectual”
Let him that hath an ear, hear.