Mrs. Kilbourne's Shakespeare quote

It was while she was tending her roses. She made a brief allusion to a quote by Shakespeare. Here is the full quote (from "Merchant of Venice", Act V):

"The man that hath no music in himself,
Nor is not moved with concord of sweet sounds,
Is fit for treasons, stratagems and spoils.
The notions of his spirit are dull as night,
And his affections dark as Erebus:
Let no such man be trusted."