A few quotes from others who have pondered this passage…
“If Torah was the pride of the Jews, their response to it was disappointing. Torah was not a possession to be hoarded but a gift which entailed a responsibility. Calvin believed the Jews were first to be the depositories of Torah and then the dispensers of it. But in this they failed.” James R. Edwards
“Some people believe that they are secure when they are not because they have never truly come to faith. … Believers should not so presume on their “security” that they fail to make every effort to bring their lives into obedience to Christ. It is precisely for this reason that many contemporary theologians and preachers prefer the slogan “perseverance of the saints” to “eternal security.” Douglas J. Moo