“Seth material” search engine (Jane Roberts)

When you find yourselves therefore noticing more and more the inequalities, the disasters and the shames that come within your sphere of perception, you add to their existence. This may confound what common sense may tell you. However, concentration reinforces the quality which is concentrated upon.

I will not go more deeply into this, for we have mentioned it often, and I address myself now to you both. When you are concentrating upon destructive elements, you lose on two points. You reinforce the destructive qualities by the very act of concentrating upon them, and you rob yourselves of the constructive qualities that you could be concentrating upon, and therefore that you could be reinforcing.

Had she concentrated upon constructive elements, upon positive and not negative qualities, not only would the tumor itself be nonexistent, but she would have constructed a positive element in its stead. A spiritual growth, for example.