'Merely' in the Bible

O Yahweh, put them in fear. Let [the] nations know they [are merely] human. Selah

“Behold, You have made my days as [short as] hand widths,And my lifetime is as nothing in Your sight.Surely every man at his best is a mere breath [a wisp of smoke, a vapor that vanishes]! Selah.

You return people to dust merely by saying, "Return, you mortals!"

I will run the way of Your commandments [with purpose],For You will give me a heart that is willing.