Richard Baxter on choosing your calling

I heard this quote first on Packer's teaching series on the Puritans but this website has it too: http://www.gracebaptist.ws/sermons/notes/PuritanStudy/Puritan1.html

"Choose that employment or calling in which
you may be most serviceable to God…
Choose not that in which you may be most
Rich or honorable in the world, but that in
which you may do most good…

In choosing a trade or calling, the first consideration should be the service of God and the public good, and therefore, that
calling that most conduceth to the public
good is to be preferred.