Therefore to you who believe he is precious: but to the unbelievers, the stone which the builders rejected, the same has become the head of the corner, and the stone of stumbling, and the rock of offence,

Why? Because they sought it not from faith, but as it were from works: they stumbled over the stone of stumbling,

as has been written, Behold, I lay in Zion a stone of stumbling and a rock of offence: and he that believeth on him shall not be ashamed.