Never worry about what you say to a man. They're so conceited that they never believe you mean it if it's unflattering.

Where large sums of money are concerned, it is advisable to trust nobody.

I am not one to rely upon the expert procedure. It is the psychology I seek, not the fingerprint or the cigarette ash.

I have often had occasion to notice how, where a direct question would fail to elicit a response, a false assumption brings instant information in the form of a contradiction.

There are doubtless certain unworldly people who are indifferent to money. I myself have never met one.

For in the long run, either through a lie, or through truth, people were bound to give themselves away.

You cannot mix up sentiment and reason.