The phrase "a fundamental message of" is correct and usable in written English.
It can be used when discussing the main idea or core theme of a text, speech, or concept.
Example: "The novel conveys a fundamental message of hope and resilience in the face of adversity."
Alternatives: "a core message of" or "a key theme of".
But this peculiarity epitomizes a fundamental message of Ms. Ruhl's odd and enchanting play: We may never come to a full understanding of the jokes life plays, but the wisest and possibly noblest response is to have a good laugh anyway.
In fact, a fundamental message of Judaism was that the God of the universe cared about social justice, peace, and love, and hence sought for people to engage in lives that fostered a society that embodied those values.
"You are the couriers of a fundamental message amidst the reality in which farmworkers find themselves.
He heaped particular praise onto the Archbishop of Canterbury and Pope Francis, whom he described as a "wonderful" man who had stripped back church teaching to reveal its fundamental message of love.
With puns, jokes and a touch of naughty wordplay, President Abdurrahman Wahid lifted the mood of Indonesia's bitterly feuding legislature today, soothing it with the fundamental message of his presidency: debate and disagreement are acceptable, even healthy.
So, of course, does the gay community, which many people feel has badly distorted the fundamental message of prevention, by subordinating it to the idea that there is nothing wrong with being H.I.V.-positive.
The fundamental message of the first article, namely that seemingly minor changes in the order of genes in a chromosome can have a far-reaching evolutionary impact, is an excellent example of a basic concept of science that "many Americans simply don't understand," to quote the second article.
