…any such spectator fail to know in his own breast, that these men, through their very delusions, showed great qualities, susceptible of being turned to the happiest and best account; and that to pretend (on the strength of sweeping axioms, howsoever cut and dried) that they went astray wholly without cause, and of their own irrational wills, was to pretend that there could be smoke without fire, death without birth, harvest without seed, anything or everything produced from nothing.
There are no more uses of "irrational" in the book.
Show samples from other sources
Irrational thoughts started swimming through his mind—he wanted to jump up and attack, beat him like he’d beaten Gaily after escaping the Maze.
James Dashner -- The Scorch Trials
He’d held his temper—he hadn’t done anything too impulsive or irrational.