This man's proof of God's existence rested in his 
This man's proof of God's existence rested in his belief that human perceptions of the outside world are consistent because a Spirit maintains them. He advanced this proof in a treatise in which he also claimed that numbers and colors are subjective. By saying that, he opposed John Locke's abstractions, personified as Hylas, and advanced his own philosophy, which he called "immaterialism" and represented as Philonous in three namesake Dialogues. For 10 points, name this Irish clergyman, the author of Alciphron, who said "esse est percipi," or, "to be is to be perceived."
This man's proof of God's existence rested in his belief that human perceptions of the outside world are consistent because a Spirit maintains them.
George Berkeley