Why do we need to understand our coming and going? The Twelve Nidanas, like the constantly moving wheel, take us into, out of and back into this world over and over again. We need to be prepared when this process restarts. What the Twelve Nidanas deal with is something that everyone has to face, and how to face it is a very important lesson for us all.
The Twelve Nidanas as presented in Ornament of Clear Realization are quite complicated. The intent of this discussion is, however, to focus only on the parts that are important for us to know.
We have all been through the cycle of the Twelve Nidanas innumerable times. It is still continuing today because we have not prepared to confront it so far. In fact, not knowing how to deal with it is the real reason. Unless we begin to tackle it now, the cycle of death and rebirth will never end on its own. This is obviously quite an important matter.
~Depicted from THE RIGHT VIEW - The Twelve Nidanas1—the sequence of cyclic existence