For most architects, the design starts inside the brain. We are then challenged to extract that creative spark out of our head and on to paper, or these days, on to a computer screen. Urgently, we grasps at the tools of our trade to convert the abstract ideas into some visual form of communication, i.e., the sketch on the back of an envelope, the first computer drawing, or the crude paper model.
Often, our ideas are grander, more ambitious, than any tool can capture. Tools have limits, whereas our artistic spirits do not.