Psalm 127:1 says "except the LORD build the house, they labour in vain that build it." The house here is the household — the family. The parent who homeschools is not the architect; God is. The labor is real and required, but the building belongs to God. This relieves the parent of the weight of being solely responsible for the outcome, which is a different thing than being released from the effort.
The comparison trap is real for homeschooling parents — the curriculum that other families use, the milestones their children seem to hit on schedule, the confidence other parents seem to carry. Lamentations 3:22 is a daily reminder: the mercies are new each morning. What was not accomplished yesterday does not foreclose today. Grace is not a one-time covering for past failures; it renews.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.