The phrase "a central lesson" is correct and usable in written English.
It can be used when discussing a key takeaway or important point from a discussion, text, or experience.
Example: "The central lesson from the seminar was the importance of effective communication in teamwork."
Alternatives: "a key takeaway" or "a main point".
It is a central lesson from this case".
This seems like a central lesson that this course is trying to convey.
A CENTRAL lesson of the Great Depression was that economies mired in deep downturns seldom recover quickly on their own.
The caution surrounding Libya grows from a central lesson of America's decade at war: When the United States is the driving force of a revolution, it owns the outcome, good or bad.
A central lesson from the discourse on emergent blockchain technology is that the current speed of global constitutional, legislative, regulatory and adjudicatory systems not only should but must accelerate by quantum leaps commensurate to those of the underlying technologies they relate to.
A staff report issued on Wednesday concluded that a central lesson of the 2001 terrorist attacks was that under the fragmented system now overseen by George J. Tenet, the director of central intelligence, the 15 departments and agencies simply "lacked the incentives to cooperate, collaborate and share information".
Indeed, setting aside Bush's weaknesses for a moment, the central lesson of his failed campaign is how weak the Party apparatus really is.
The central lesson was written on a sign left by an unsettler as he abandoned a plowed-up chunk of Nebraska's Sandhills: "God made this country right side up.
The central lesson of over a half century of First Amendment adjudication is that freedom is sometimes a hazardous enterprise, and that the Constitution requires the State to bear certain risks to preserve our liberty.
The American military has been eagerly reading "Three Cups of Tea" but hasn't absorbed the central lesson: building schools is a better bet for peace than firing missiles (especially when one cruise missile costs about as much as building 11 schools).
"Conceivability or inconceivability is a life's work — it's not something where you just screw up your head for a second!" He feels that Darwin's central lesson — that everything in biology is gradual; that it arrives "not in a miraculous, instantaneous whoosh, but slowly, slowly" — is too easily swept aside by our categorical habits of mind.
