Why does Les take the responsibility of his book so seriously?

Les teaches that when anyone picks up this book, whether a Sunday school teacher or someone leading a small devotional, that person is accepting a tremendous responsibility. He says he does not take it lightly, because if he were guilty of misleading someone to the place of missing heaven's glory, he would have to answer for it. He also warns that preachers and theologians who mislead people will have the hottest corner in the lake of fire, since they mislead multitudes. He adds that he would be scared to death of presenting an error, though he admits he is human and not above error. He will not compromise the fundamentals: who Christ is, that He was virgin born, that He is God the Creator, that His atoning work of the cross completed every bit of God's requirement for salvation, that He rose from the dead, and that He is coming again. He says if he sounds bold at times, this is why.