We all want our lives to mean something. We all want our toil and labor and sweat and effort to accomplish something, to count in some way. We all have this insatiable thirst for our lives to be about more than just survival or even pleasure or entertainment. But Solomon says your no matter how much you toil and labor and plan it will all be in vain unless the Lord builds the house. If we want it all to count, then we have to let the Lord build the house. But what does that mean?
It means that we need to acknowledge that he is in control and the he is the architect. No matter how much men want to build their own kingdoms, God will get his way.
Remember Balaam, Jonah, Nebuchadnezzar, Saul? All of these men were running one direction and God stopped them dead in their tracks. We have to spend our life doing things that are according to God's master plan. And what exactly is that? There are many things, but Psalm 127 focuses on one of the main ones: he wants us to invest in the children he has given to us. The culture around us says that having children is not a blessing, that having children will cost you opportunity in your job, in your experience, in your happiness. But God tells us otherwise -children are a blessing! A mother and father who gives of their resources and time to their children will never regret it. They will never wish they had done something different and been more selfish with their time and money. To invest in our children is to allow God to build the house! Those who listen to God's plan will not be ashamed.