Complex sentence: The B'omarr monks are a very secretive sect whose ultimate goal is to achieve enlightenment and to ponder the mysteries of the universe, including the "Ultimate Truth", which they are constantly in search of.
Split into simpler sentences: The B'omarr monks are a very secretive sect whose ultimate goal is to achieve enlightenment and to probe the mysteries of the universe. They also desire to find the "Ultimate Truth" which they are constantly in search of.