1. All Life, all Existence, and the entire Cosmos are mysteries and all our science and probing are likewise speculative and pragmatic. If a theory seems supported by observation, experiment, application and practical experience—if it works!—then we assume it to be correct. (Those of us old enough remember that some of yesterday's science is often today's folklore, and some things that were once fictional speculation are among today's science.)
Resolving these mysteries is not only the endless adventure of life, but for each of us it is a path to growth and development. Mysteries will always be with us, and will always challenge us even when we think we've solved one, another will pop up. And even those previously solved will open up further mysterious dimensions. As the Cosmos is infinite, so are its mysteries, and so is the human drive to grow and understand.