In today's Gospel reading from Luke 13, someone asked Jesus, "Lord, will only a few people be saved?" Jesus did not answer the question directly, but made it clear that the gate through which we must enter to be saved is narrow and that many would not be strong enough to enter through it. He said that the evildoers would one day find the door locked and hear the Lord say to them, "I do not know you. Depart from me." When they found themselves cast out of the kingdom of God, there would be wailing and grinding of teeth.
We do not know who will or will not be saved for sure, but this much we know: Hell exists and will not be empty. Therefore, know God as intimately as possible now to avoid being cast out later. It's such a serious matter that we must absolutely pay serious attention.