There are many anecdotal stories about him that relate to this moral equation, see for example the following references.

She had been brought up with such simple moral equations.

But one day you and I must sit down and work out the moral equation in detail.

But the abdication of personal responsibility by some religious leaders in America is only half of the confused moral equation since Sept. 11.

Serina seemed to have to think about this for a moment, perhaps deciding some moral equation that she had formed.

In Israel, some critics objected to the film as "creating a moral equation between the killers and their victims".

The Fuller experience provides a textbook example of the thorny moral equations that lie beyond the simple arithmetic of the bottom line.

The moral equation has changed.

The coalition succeeded by turning homelessness into a simple, powerful moral equation, but the equation wasn't actually so simple.

This singular fact altered the entire moral and existential equation for Italy's Jews.