It's because Jesus spoke so frequently about hell that the church should take the concept seriously.
R. C. SproulWhen God's justice falls, we are offended because we think God owes perpetual mercy. We must not take His grace for granted. We must never lose our capacity to be amazed by grace
R. C. SproulWhat is the difference between the Christian God, and the gods of the other religions?" He simply, yet profoundly answered, "The main difference is this: The God of Christianity exists.
R. C. Sproul