What is man - What claim has one so weak, and frail, and short-lived, to be remembered by time? What is there in man that entitles him to so much notice? Why has God conferred on him so signal honor? Why has he placed him over the works of his hands? Why has he made so many arrangements for his comfort? Why has he done so much to save him? He is so insignificant his life is so much like a vapor, he so soon disappears, he is so sinful and polluted, that the question may well be asked, why such honor has been conferred on him, and why such a dominion over the world has been given him. See these thoughts more fully expanded in the notes at Hebrews 2:6.
That thou art mindful of him - That thou dost remember him; that is, think of him, attend to him - that he does not pass away wholly from thy thoughts. Why should a God who is so vast and glorious, and who has all the starry worlds, so beautiful and grand, to claim his attention - why should he turn his thoughts on man? And especially why should he honor him as he has done by giving him dominion over the works of his hands?
And the son of man - Any descendant of man - any one of the race. What was man, as he was originally made, that such exalted honor should have been conferred on him; and what has any one of his descendants become, in virtue of his native faculties or acquired endowments, that he should be thus honored? The design is the same as in the former part of the verse, to express the idea that there was nothing in man, considered in any respect, that entitled him to this exalted honor. Nothing that man has done since the time when the question was asked by the psalmist has contributed to diminish the force of the inquiry.
That thou visitest him - As thou dost; that is, with the attention and care which thou dost bestow upon him; not forgetting him; not leaving him; not passing him by. The word used here - פקד pâqad - would properly express a visitation for any purpose - for inspection, for mercy; for friendship, for judgment, etc. Here it refers to the attention bestowed by God on man in conferring on him such marks of favor and honor as he had done - such attention that he never seemed to forget him, but was constantly coming to him with some new proof of favor. What God has done for man since the psalmist wrote this, has done nothing to weaken the force of this inquiry.