I have this new idea, but people shoot it down and makes me less likely to take action

Sagan wrote that imagination will often carry us to worlds that never were, and without it we go nowhere. Carroll wrote that imagination is the only weapon in the war against reality. But lest we forget, the human mind is like tofu. It's a neutral entity that takes on the flavor of whatever sauce we cook it with. Like most things in this world, it's all in how we use it. Cognitive behavioral therapists have term called negative imagination. It's an internal rehearsal. We rapidly catastrophize a situation, trying to fill in the gaps by coming up with every grim possibility we can, and in the process destroying any sense of confidence we might have. The business world is rife with this poison. Negative imagination scares people out of taking action. Cynical managers look for the reasons that something isn't working instead of the reasons that it is. They harbor more justifications for abandoning ideas than executing them.