...nothing in the world is harder than convincing someone of an unfamiliar truth.
Doubt is a question mark; faith is an exclamation point. The most compelling, believable, realistic stories have included them both.
A relationship is likely to last way longer, if each partner convinces or has convinced themselves that they do not deserve their partner, even if that is not true.
Arguments are to be avoided: they are always vulgar and often convincing.
At a time like this, scorching irony, not convincing argument, is needed.
Several excuses are always less convincing than one.
Half of figure skating is opinion, convincing judges.