Be gratified vainly by one's own achievement; exaggerate one's good points. For example, He flattered himself that his presentation at the sales conference was a success, or She flattered herself that she was by far the best skater at the rink. This usage is often put negatively, as in Don't flatter yourself—we haven't won the contract yet. [Late 1500s]
Words nearby flatter oneself
How to use flatter oneself in a sentence
The speaker conjures up centuries of collective sagacity, aligning oneself with an eternal, inarguable good.Politicians Only Love Journalists When They're Dead|Luke O’Neil|January 8, 2015|DAILY BEAST
Perhaps there is something too painful about throwing oneself too deep into what went wrong.
When one plays life that way, one in a way awakes creative vital energies in oneself that otherwise are not available.
How many details are needed, after all, before one can say to oneself, “This is what I have lost?”
And so the reaction seems to be to corral oneself off from disagreement.Pew Study: Americans Are Self-Segregating Amid Proliferating Partisan Media|John Avlon|October 21, 2014|DAILY BEAST
She seemed to imply that I was a modest soldier, and if there is a way to flatter a man it is to call him modest.The Soldier of the Valley|Nelson Lloyd
The habit of refreshing oneself with a pipe on some elevated spot which commands a fine view, is common to both sexes.
He urged, that it would flatter the peculiarities of her character, and might conciliate her good offices for his liberty.The Pastor's Fire-side Vol. 3 of 4|Jane Porter
To suddenly discover oneself proficient where failure had been feared increases self esteem and adds to the sum of happiness.
He afterwards enlarged his model and adopted a flatter pattern, and arrived at the greatest perfection about 1700.Violins and Violin Makers|Joseph Pearce