The Bible says "...how can we neglect so great a salvation". Might it be that we neglect such a great gift of salvation from God because we take our salvation lightly? Might it be that we take it lightly because we do not fully grasp what it means? Christ's work at the Cross didn't just save us - it brought reconciliation, redemption, righteousness, and a quickening.
Christ's finished work justified us, made us alive with Christ and in Christ, and made us partakers of a divine nature. Yes, how can we neglect so great a salvation?