It is very important to have a good foundation. When your base is solid, robust, and well-designed for the task you can build anything. When your foundation, your spine(black-gray rectangles) is full of steel and black energy, you can withstand any problem or burden that is laid on you. Nevertheless your spine should be flexible, because the heavy loads ask for a certain flexibility. The stiff spine breaks easier.The things that don't break your spine make you stronger(the color bands create a new spine in the center).