Psalm 127 is a working song of Christ’s people. What truths are to be on our hearts as we build for God?

Psalm 127 English Standard Version (ESV)
Unless the Lord Builds the House
A Song of Ascents. Of Solomon.
127 Unless the Lord builds the house,
those who build it labor in vain.
Unless the Lord watches over the city,
the watchman stays awake in vain.
2 It is in vain that you rise up early
and go late to rest,
eating the bread of anxious toil;
for he gives to his beloved sleep.

3 Behold, children are a heritage from the Lord,
the fruit of the womb a reward.
4 Like arrows in the hand of a warrior
are the children[a] of one’s youth.
5 Blessed is the man
who fills his quiver with them!
He shall not be put to shame
when he speaks with his enemies in the gate.[b]

Bible Reading

1 Peter 2:4-10 English Standard Version (ESV)
4 As you come to him, a living stone rejected by men but in the sight of God chosen and precious, 5 you yourselves like living stones are being built up as a spiritual house, to be a holy priesthood, to offer spiritual sacrifices acceptable to God through Jesus Christ. 6 For it stands in Scripture:

“Behold, I am laying in Zion a stone,
a cornerstone chosen and precious,
and whoever believes in him will not be put to shame.”

7 So the honor is for you who believe, but for those who do not believe,

“The stone that the builders rejected
has become the cornerstone,”[a]

8 and

“A stone of stumbling,
and a rock of offense.”

They stumble because they disobey the word, as they were destined to do.

9 But you are a chosen race, a royal priesthood, a holy nation, a people for his own possession, that you may proclaim the excellencies of him who called you out of darkness into his marvelous light. 10 Once you were not a people, but now you are God’s people; once you had not received mercy, but now you have received mercy.