Siman 385

(47.) Once I spoke with him o.b.m. and said before him that his conversation is literally Torah. And he agreed with my words. And he said: "Just as a Torah scholar cannot speak without Torah words coming into his speech — some Gemara expression and the like, as is the way of scholars — so too in all his words it is compelled that Torah matters come into them as his way. As we have seen with our eyes many times that several Torah discourses were made from his conversation — from that very conversation itself a wondrous Torah discourse was afterwards made. And this is what we saw with our own eyes..."