Sermon on the Mount: Nice words from Jesus?

The worst tragedy would be to turn the Sermon on the Mount into another form of legalism; it should rather put an end to all legalism. Legalism like the Pharisees' will always fail, not because it is too strict but because it is not strict enough. Thunderously, inarguably, the Sermon on the Mount proves that before God we all stand on level ground: murderers and temper-throwers, adulterers and lusters, thieves and coveters. We are all desperate, and that is in fact the only state appropriate to a human being who wants to know God. Having fallen from the absolute Ideal, we have nowhere to land but in the safety net of absolute grace.
- Philip Yancey, from The Jesus I never knew, p.144