The phrase "a message of optimism" is correct and usable in written English.
You can use it when referring to a communication or statement that conveys a hopeful or positive outlook.
Example: "The speaker concluded the presentation with a message of optimism about the future of renewable energy."
Alternatives: "a note of hope" or "a sign of positivity."
In his homily, Archbishop Dolan offered a message of optimism.
If our letter 10 years ago was intended as a warning, now I want to offer a message of optimism.
"I come from the United Kingdom with a message of hope and a message of optimism," he said in his remarks on Wednesday.
For a message of optimism to have narrowed the gap to that from 20 points a year ago is a tremendous victory.
Designed to fill a gap in global development studies, the list offers a message of optimism as well as a warning.
But seeing how excited all the tourists were that morning reminded me that the Olympics still carries a message of optimism, and maybe even innocence, for so many people in this country.
He made it a message of tremendous optimism.
DT: So just so you understand, mine is a message of great optimism.
Clearly hoping that the latest round of tax cuts would diminish the role of the economy in the presidential race, Mr. Bush had spent much of the summer, including portions of what the White House called his "working vacation" on his ranch in August, serving up a message of cautious optimism.
President Bush brought a message of economic optimism to steel country on Sunday, asserting that he had delivered on his promise to help the beleaguered steel industry and making a broader case that his policies were the best way to guide the economy through unsettled times.
What Trump's supporters also hear from their champion is a message of unbridled optimism — a promise that he can repair the economy, bring jobs back and Make America Great Again.
