I have alluded to him, Reader, because I think I see in him an intellect profounder and more unique than his contemporaries have yet recognised; because I regard him as the first social regenerator of the day — as the very master of that working corps who would restore to rectitude the warped system of things; because I think no commentator on his writings has yet found the comparison that suits him, the terms which rightly characterise his talent.
There are no more uses of "rectitude" in the book.
Show samples from other sources
Mr. Cunningham, a man of uncompromising rectitude, had given her a pint free of charge for having guessed his name yesterday, one of the tiny things she adored about Maycomb: people remembered their promises.
Harper Lee -- Go Set a Watchman
Now I sat down to write a different kind of letter, one that tried to convey how much she meant to me, how much she had taught me, how I wanted to emulate her rigor and rectitude, how much I loved her and missed her.