He realizes the fruitlessness of his materialistic ways.
From the azstarnet.com
That's the essence of the age-the fruitlessness.
From the forbes.com
Maybe it comes down to something as simple as the fruitlessness of a rat on an exercise wheel, burning energy but going nowhere at the same time.
From the news-journalonline.com
Not surprisingly, parents and schoolteachers take a markedly different view, prompting a few conversations on the fruitlessness of violence and the genesis of war.
From the timesunion.com
Not surprisingly, parents and schoolteachers take a negative view of his vengeance, prompting a few conversations on the fruitlessness of violence and the genesis of war.
From the sfgate.com
When Halfpenny nailed the breaking Barnes with a minute to go it seemed like the Welsh autumn of missed opportunities and fruitlessness was about to end with a winning flourish.
From the independent.co.uk
More examples
A lack of creative imagination
The quality of yielding nothing of value
(fruitless) bootless: unproductive of success; "a fruitless search"; "futile years after her artistic peak"; "a sleeveless errand"; "a vain attempt"
The fruitless gene (fru) is a Drosophila melanogaster gene that encodes several variants of a putative transcription factor protein. ...