16 therefore, thus says the Lord God,
See, I am laying in Zion a foundation stone, a tested stone,
a precious cornerstone, a sure foundation:
"One who trusts will not panic."
17 And I will make justice the line, and righteousness the plummet;
Brueggemann (1): p 226
'…the poem offers an assurance that is most characteristic of the Isaiah tradition. Yahweh provides a reliable alternative to the madness of the leaders. The rhetoric is exaggerate: foundation stone, tested stone, precious, sure. …
Yahweh offers a safe haven from the coming scourge, a sure place of refuge in which to be safe. Most plausibly, this is an invitation to trust in Yahweh, given in the imagery of Zion. The summons to faith is the only "safe place" in a world severely under assault.'
This imagery is taken up as testimony to Jesus in the early church … In New Testament faith, it is Jesus who is the sure place of well-being. To be sure, the christological appropriation of the imagery is a daring one. Given that, however, the usage is congruent with that of Isaiah. In both cases, the gift of God is an offer of protection from an unlikely source in a season of acute danger.
In verse 17 the offer of refuge is marked by the characteristic terms "justice and righteousness" that link well-being to convenantal requirements…'