Sometimes a negative emotion is present, a strong intention to do harm is present, and we might even have prepared to undertake the action, but if we do not carry out that act, it will not be a fully karmic act, and will not produce complete negative karmic fruition.
We need 1) the object of an action to be present, 2) a negative state of mind, 3) the motivation, preparedness or strong intention to do harm, a.
In other words, we create negative karma through coordinating body, speech and mind.
Sometimes a negative emotion is present, a strong intention to do harm is present, and we might even have prepared to undertake the action, but if we do not carry out that act, it will not be a fully karmic act, and will not produce complete negative karmic fruition