Making allowance for his being a little flighty, you know how rationally, and sensibly, and honourably he talked, when we saw him in the garden.
’Be rational, sir, pray,’ said Ralph.
And what better means could she adopt, towards so virtuous and laudable an end, than proving to all men, in her own person, that his passion was the most rational and reasonable in the world, and just the very result, of all others, which discreet and thinking persons might have foreseen, from her incautiously displaying her matured charms, without reserve, under the very eye, as it were, of an ardent and too-susceptible man?
There are no more uses of "rational" in the book.
Show samples from other sources
It’s hard to think rationally when I’m this upset.
Let’s try to ignore how upset we are for a moment and think about this rationally.