What is the purpose of the words "hour" and "spring"?

"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.