For reasons involved in the very foundation of his psychology, Mr Verloc was inclined to put his trust in any woman who had given herself to him.

Therefore he trusted his wife.

Their accord was perfect, but it was not precise.

It was a tacit accord, congenial to Mrs Verloc's incuriosity and to Mr Verloc's habits of mind, which were indolent and secret.

They refrained from going to the bottom of facts and motives.
This reserve, expressing, in a way, their profound confidence in each other, introduced at the same time a certain element of vagueness into their intimacy.