"You ought not to think an hour upon the matter, but to spring to action at once. The purpose of the words "hour" and "spring" is: A) Most of the sentences contain comma splices. A comma splice is the use of a comma to join two independent clauses. The comma is followed by a conjunction. Two independent clauses: 1) You ought not to think an hour upon the matter. 2) You ought to spring to action at once. conjunction used is BUT.