Air-built

Air´-built`


a.1.Erected in the air; having no solid foundation; chimerical; as, an air-built castle.
References in classic literature ?
The glare and hurry of broad noon are not adapted to idle pursuits like mine; a glimpse of passing faces caught by the light of a street-lamp or a shop window is often better for my purpose than their full revelation in the daylight; and, if I must add the truth, night is kinder in this respect than day, which too often destroys an air-built castle at the moment of its completion, without the least ceremony or remorse.
I was grieved for him; I was grieved for the overthrow of all our air-built castles: but, with the elasticity of youth, I soon recovered the shook.
This simple family, born and bred in retirement, and wholly unacquainted with what is called the world--a conventional phrase which, being interpreted, often signifieth all the rascals in it-- mingled their tears together at the thought of their first separation; and, this first gush of feeling over, were proceeding to dilate with all the buoyancy of untried hope on the bright prospects before them, when Mr Ralph Nickleby suggested, that if they lost time, some more fortunate candidate might deprive Nicholas of the stepping-stone to fortune which the advertisement pointed out, and so undermine all their air-built castles.