First you have to imagine something in your mind. The thoughts then gain substance from the feelings in the mind. Those expanded thoughts move from your love, fears and creativity, to expression.
The artist expresses thoughts and feelings. The result is real. It is knowledge created, expressed, and with a life of it's own.
Quote by Albert Einstein
"I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.”