It's the same with spirit ...

It's the same with spirit guises; show me a sweet little choirboy or a smiling mother and I'll show you the hideous fanged strigoi it really is. (Not always. Just sometimes. *Your* mother is absolutely fine, for instance. Probably.)
 Jonathan Stroud

Quotes from the same author

A dozen more questions occurred to me. Not to mention twenty-two possible solutions to each one, sixteen resulting hypotheses and counter-theorems, eight abstract speculations, a quadrilateral equation, two axioms, and a limerick. That's raw intelligence for you.
 Jonathan Stroud
Minor magicians take pains to fit this traditional wizardly bill. By contrast, the really powerful magicians take pleasure in looking like accountants.
 Jonathan Stroud
As a child I was really into fantasy books with elves and goblins and swords, and I went through a phase for a few years when I was reading endless series. But in the end I became totally fed-up with all these sub-Tolkien rip-offs because they all end up doing the same old things and there's no rigour to it.
 Jonathan Stroud
Believe me, I know all about bottle acoustics. I spent much of the sixth century in an old sesame oil jar, corked with wax, bobbing about in the Red Sea. No one heard my hollers. In the end an old fisherman set me free, by which time I was desperate enough to grant him several wishes. I erupted out in the form of a smoking giant, did a few lightning bolts, and bent to ask him his desire. Poor old boy had dropped dead of a heart attack. There should be a moral there, but for the life of me I can't see one.
 Jonathan Stroud
Hippo in a skirt: this was a comic reference to one of Solomon's principal wives, the one from Moab. Childish? Yes. But in the days before printing we had limited opportunities for satire.
 Jonathan Stroud