He presents some of the principles underlying the YOG and some of the practical challenges in implementing them .
Continuing the theme of ancient to modern , Jim Parry addresses in his essay the most recent of innovations : the YOG .
Jim Parry presents some of the principles underlying the YOG and some of the practical challenges in implementing them .
Continuing the theme of ancient to modern , Jim Parry addresses in his essay the most recent of innovations : the YOG .