The Six Perfection (generosity, ethical discipline, patience, enthusiastic effort, concentration, and wisdom) are practiced by Bodhisattvas who have the supreme intention of attaining enlightenment for the sake of all living beings.
It's an interesting explanation of the 6 perfections one should practice to find inner piece, balance and fulfillment, to eliminate the need for a ciclic existence. The last chapter, about wisdom, took me months to finish reading: The language was complex, concepts were very confusing, and overall the author keeps on repeating explanations on and on redundantly in many passages, which made me loose motivation for several times. Despite of all this, the book is very interesting, presenting Buddhist wisdom for the common reader, and perhaps it should be revised for lighter and simpler arguments.