By the law of construction and destruction, as well as by addition and reduction, the different forms in this objective world group together and change. A close study of the constant grouping and dispersing of the clouds will reveal many different forms within a few minutes, and this is a key to the same process which can be seen all through nature. The construction and destruction, addition and reduction in forms all take place under the influence of time and space. Each form is shaped and changed subject to this law, for the substance differs according to the length, depth, height, figure and shape of the mold wherein the form is modelled, and the features are formed according to the impression pressed upon it. It takes time to make a young and tender leaf green, and again to change it from green to red and yellow, and it is space that makes of water either a ditch, well, pond, stream, river or ocean.