St. John Chrysostom: When God gives such vocations...
When God gives such vocations, He wills that we should not defer even for a moment to follow them; for when the devil cannot bring a person to give up his resolution of consecrating himself to God, he at least seeks to make him defer the execution of it, and he esteems it a great gain if he can obtain the delay of one day, or even of one hour.
St. John Chrysostom