Radak

All Thy works shall praise Thee: Even the various species of living creatures that lack knowledge to recognize the perfection of Your creation and the provision of their sustenance will praise You. Human beings who understand these things will also praise You as if they were all giving You thanks. And Thy pious ones shall bless Thee: In the script of the "Hei," it is said, "And who are the thankful pious ones, for they are always contemplating Your deeds, and they shall bless You continually. For at all times, upon seeing the innovations that are constantly renewed in the creations and the repairs within life and growth, they shall bless You. So too did the sages establish a blessing for every matter according to its needs, as they said, 'When one sees this and this, they bless in this way.' And [it] said, 'And Your pious ones, for each kindness is of the utmost value, and for those who are always contemplating the work of the deity and they will bless him always at all times of contemplation are the pious.'