Stumbling block, from Isaiah:
"And he shall be for a sanctuary; but for a stone of stumbling and for a rock of offence to both the houses of Israel, for a gin and for a snare to the inhabitants of Jerusalem" (8:14).
Sort of a pride goeth before the fall thing. A common trap for folks unto whom much has been given.
>>One small thing - and this is addressed to Magdalen/Claude as well - sorry to be dense but they/you the same person or two different people using the same handle . . .<<
If you mean are we the same person, literally, the answer is no. Of kindred spirits? Spiritual brother and sister? Most definitely, in my view.