The phrase "a lasting reason" is correct and usable in written English.
It can be used when discussing a reason or justification that is enduring or has long-term significance.
Example: "Her commitment to environmental conservation was driven by a lasting reason rooted in her childhood experiences."
Alternatives: "a permanent justification" or "an enduring rationale."
But somewhere on the way back to my new home at Howard University, I came upon a more lasting reason for my visit to New York.
The growing sadness and pessimism in Saint-Exupéry's view of man appears in Citadelle (1948; The Wisdom of the Sands), a posthumous volume of reflections that show Saint-Exupéry's persistent belief that man's only lasting reason for living is as repository of the values of civilization.
But I believe there is a deeper and more long-lasting reason why the third sector is now so close to the hearts of politicians and others.
Elwha River and Olympic National Park After more than two years of work on the largest dam removal in U.S. history, the Elwha River in Olympic National Park will soon be completely free from remnants of the Elwha and Glines Canyon Dams; a victory that provides long-lasting reason to celebrate.
Just because the feast of the Nativity came along relatively late, though, doesn't mean it lacks a lasting power: there are good literary reasons we can't conceive of the mystery of the Incarnation -- the divine embodiment of the son of God -- without summoning up the images of an infant, a mother, a stable, worshipful animals and solemn magi.
A disease resulting in a lasting functional reduction must be the main reason for the reduction in earning ability of at least 50%.
The setting of a cold and frosty Victorian London was far removed from 1960s Gibraltar - and maybe that's one of the reasons it made such a lasting impression.
F1 executives suspect that one reason it has not established a lasting presence is that NASCAR finds ways to reduce F1's appeal.
His deployment to Iraq, as a member of an élite Ranger battalion, earlier that year, had been cut short for medical reasons, but it had left a lasting impression: he knew that waging war was not for him.
Mr. Austin said he thought one reason Powel Crosley failed to establish a lasting auto empire was that he fundamentally misunderstood the psyche of car buyers.
