Complex sentence: Petrarch discusses "otium" in his "De vita solitaria" as it relates to its role in human life of simple habits, self-restraint, nature appreciation, serious research, meditation, contemplation, writing, and friendship.
Split into simpler sentences: Petrarch discusses "otium" in his "De vita solitaria" as it relates to its role in human life of simple habits and self-restraint. It is time devoted to nature appreciation, serious research, meditation, contemplation, writing, and friendship.