The last refuge of the mentally destitute...

I'm re-reading W. Somerset Maugham's The Painted Veil for a book discussion and just came across what I think is the best line...

"A bird in the hand was worth two in the bush, he told her, to which she retorted that a proverb was the last refuge of the mentally destitute."

Is that not the best line ever? I have got to get that embroidered on a pillow.