A Stone of Stumbling

 What shall we say then? That the Gentiles, which followed not after righteousness, have attained to righteousness, even the righteousness which is of faith. But Israel, which followed after the law of righteousness, hath not attained to the law of righteousness. Wherefore?: Because they sought it not by faith, but as it were by the works of the law. For they stumbled at that stumblingstone, As it is written, Behold, I lay in Sion a stumblingstone and rock of offence: and whosoever believeth on him shall not be ashamed. Romans 9:30-33


Careful! I've put a huge stone on the road too Mount Zion, a stone you can't get around. 
But the stone is me! If you're looking for me, you'll find me on the way, not in the way.
~ The Message.