Final answer:
The nature of the Buddha in Theravada Buddhism is characterized by his teachings on the Four Noble Truths and the 'middle way', as well as the emphasis on personal responsibility and acceptance of others.
Step-by-step explanation:
The nature of the Buddha in Theravada Buddhism is characterized by his teachings, which encourage Buddhists to lead a moral life by accepting the Four Noble Truths. These truths state that life is suffering, suffering arises from attachment to desires, suffering ceases when attachment to desires ceases, and freedom from suffering is possible by following the 'middle way'. The 'middle way' is central to Buddhist thinking, which encourages people to live in the present and to practice acceptance of others. Buddhism also emphasizes personal responsibility rather than a role of a godhead.