Such stuff as dreams are made of.
Our revels now are ended. These our actors,
As I foretold you, were all spirits, and
Are melted into air, into thin air:
And like the baseless fabric of this vision,
The cloud-capp'd tow'rs, the gorgeous palaces,
The solemn temples, the great globe itself,
Yea, all which it inherit, shall dissolve,
And, like this insubstantial pageant faded,
Leave not a rack behind. We are such stuff
As dreams are made on; and our little life
Is rounded with a sleep.
The Tempest Act 4, scene 1, 148–158
I wanted to quote this Shakespeare play because he was one of our greatest playwrights and poets. A genius. To understand this quote, you must understand the context of the play.
Humphry Bogart misquoted the saying. It was supposed to be:
"Such stuff as dreams are made on."
Sort of meaning people are what dreams are made of.