Yes, he is young, and youth is invariably self-confident.
That while the writing of different persons done with the right hand varies, that performed with the left hand is invariably uniform.
Monte Cristo shook it coldly, according to his invariable practice.
"One plan occurred to me," continued Albert; "Franz likes all that is eccentric; I tried to make him fall in love with Mademoiselle Danglars; but in spite of four letters, written in the most alluring style, he invariably answered: ’My eccentricity may be great, but it will not make me break my promise.’
There are no more uses of "invariably" in the book.
Show samples from other sources
I tell myself to go to sleep early, but I invariably end up watching television late into the night.
You better tell her we’re starting earlier. She’s invariably late.