Building Castles In The Air Quotes by Thomas Traherne, Henrik Ibsen, William Rounseville Alger, Edward Gibbon, Richard Whately, Edward Bulwer-Lytton, 1st Baron Lytton and many others.

Your enjoyment of the world is never right, till every morning you awake in Heaven: see yourself in your Father’s palace; and look upon the skies, the earth, and the air as celestial joys: having such a reverend esteem of all, as if you were among the angels.
Castles in the air – they are so easy to take refuge in. And so easy to build too.
A sigh can shatter a castle in the air.
There is more pleasure to building castles in the air than on the ground.
To know your ruling passion, examine your castles in the air.
Leave glory to great folks. Ah, castles in the air cost a vast deal to keep up!

When I got to the library I came to a standstill, – ah, the dear room, what happy times I have spent in it rummaging amongst the books, making plans for my garden, building castles in the air, writing, dreaming, doing nothing.
You may build castles in the air, and fume, and fret, and grow thin and lean, and pale and ugly, if you please. But I tell you, no man worth having is true to his wife, or can be true to his wife, or ever was, or will be so.
A neurotic is a man who builds a castle in the air. A psychotic is the man who lives in it. A psychiatrist is the man who collects the rent.
Thus we build on the ice, thus we write on the waves of the sea; the waves roaring pass away, the ice melts, and away goes our palace, like our thoughts.
If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.