Final answer:
Jonathan Edwards was the Great Awakening preacher who used reason in his sermons to inspire people to 'walk with God', contrasting George Whitefield's emotional style.
Step-by-step explanation:
The Great Awakening preacher who used reasonable arguments to convince people to live in a way that allowed them to 'walk with God' was Jonathan Edwards. Unlike George Whitefield, who was known for his emotional preaching style, Edwards's preaching was more restrained and relied on reason to reach his listeners. Edwards read Locke and Newton and was inspired by Gilbert Tennent; he became a key figure in the Great Awakening following the impact of his sermon 'Sinners in the Hands of an Angry God,' which provoked a powerful emotional reaction amongst the attendees in 1741, despite being reasoned in its approach.