"deepest purpose" is a correct and usable phrase in written English.
You can use this phrase when referring to the ultimate goal of something. For example: He dedicated himself to achieving his deepest purpose - to make a positive difference in the world.
Every writer is first a member of a community of readers, and the deepest purpose of reading and writing fiction is to sustain a sense of connectedness, to resist existential loneliness; and so a novel deserves a reader's attention only as long as the author sustains the reader's trust.
The idea that "the deepest purpose of reading and writing fiction is to sustain a sense of connectedness, to resist existential loneliness" crops up all over the writing of the Conversazioni group: in Franzen's nonfiction, and in Wallace's, and in Smith's beautiful encomium to Wallace in her book of essays, "Changing My Mind".
Each of us must identify our deepest purpose, reconnect with our values.
But then how can you make sure your deepest purpose is to no longer have a job?
After considerable deliberation he understood that his deepest purpose was in his loyalty and responsibility to his aging parents.
How often do we have the chance to re-examine our deepest purpose and priorities, change them and strike out on a new and more enlivening course?
Nussbaum offers a manifesto that should be a rallying cry for anyone who cares about the deepest purposes of education.
In the shadowy landscape of "Henry IV," in which life is truly a battlefield, men mostly keep their deepest purposes to themselves.
But the stagecraft had a deeper purpose.
"A cheeky attitude anchored by deep purpose".
But it serves a deeper purpose.
