That phrase is from the Declaration of Independence, not the Constitution. The way the Constitution works is that the Federal government only has those powers

That phrase is from the Declaration of Independence, not the Constitution. The way the Constitution works is that the Federal government only has those powers it is granted, which are limited by items such as the First Amendment, which does not generally restrict individuals (including corporations--there is no "cf" here; corporations are simply people, though they are not 'natural persons", where that distinction matters).