calvin on psalm 127

It behooves us to remember what I have just now touched upon, that since the minds of men are commonly possessed with such headstrong arrogance as leads them to despise God, and to magnify beyond measure their own means and advantages, nothing is of more importance than to humble them, in order to their being made to perceive that whatever they undertake it shall dissolve into smoke, unless God in the exercise of pure grace cause it to prosper.