No-one likes to be tricked and love can so often be mere delusion - a trick of the hormones.

Could it be that these gory tales of medieveal days were not mere delusions?

It's not even pretentious, when you think about it - it's mere delusion.

But the reality that we call 'God' cannot be tested empirically, so how could we be sure that our beliefs were not mere delusions?

In fact, as The Times reported, the researchers promptly concluded that ghosts are mere "bodily delusions," electrical misfirings and nothing more.

He feared that the profound transformation of his personal life, which had resulted from his experiment with LSD, could rest on a mere delusion.

One summer night, after a thunderstorm of unprecedented violence, the countryside was aroused by a squatter stampede which no mere delusion could create.

The former- external objects in space- might be a mere delusion, but the latter- the object of my internal perception- is undeniably real.

The question as to the possibility of it would stand thus: "Have we an internal sense, but no external sense, and is our belief in external perception a mere delusion?"

You can so easily establish if my fears are real or mere delusions.