What Am I

I am infinity, limited only by ones heart. Colourful, expressive, touching to the heart, and soothing to the mind. Totally unknown... and yet, so clear. A splurge of uncontrollable expression. Rough, dark, bright, painful, heartening, brings tears to my eyes. Flying, running, or merely standing still. It doesn’t matter. The world is void. It is present, but irrelevant. A source of so much desire, you just have to release it. Once relieved of your pain, you willingly let your soul return to earth. Like a cloud seen in the sky, it is ever changing. There are many different types, with many more yet to be discovered. Done every day, for work, or for pleasure, it may be yours to decide. A volcano, or a small mound, each is as big and tremendous as the other. As beautiful as a proud rose opening its delicate petals in the warmth of the rising sun, and so too must it come to rest. What am I ?