It is not saying rapture. It is like that parable of the 10 virgins - half were sent to *buy’ oil because they did not have any.
There is an interesting way to look at those ten bridesmaids. There were five who kept oil in their lamps. It Bible analogies oil is used for the Holy Spirit. The five who went to buy oil were carrying lamps, probably nice shiny ones, lamps that look good, were the best money could buy, but they were just lamps. With no oil in them they gave no light so those carrying them, those more about their lamps than the oil in lamps were left behind.
The wise were prepared, having kept the commandments, the unwise were not.
This is where the coming as a thief comes in. There is no time to do what you should have been doing.