To consider that everything is already created would take much Joy away from the process of creating something fresh, new and exciting into this world. It would be more accurate to state that your creative inspirational thought and the object of your creation are as One.
In this world, you can measure something that comes into existence as a result of you creating it step by step. You have painted the particles to fill the canvas of your thought processes.
The energy vibrations of that which you creating are bringing to you the thoughts of its creation. What exists in its entirety within the imagination of the Soul begins to take shape from its emergence into physical existence at the end of your brush as the combined results of your thoughts and subsequent actions. For your beautiful art would not exist had you not thought it into existence. And your thoughts would not exist without the creation of your art. You and your art are One.