"Nothing is more dangerous than an idea, when it's the only one you have." Émile Chartier. …especially if you also have the one desperate need to push that idea onto everyone else.

There is a fine line between passionately believing in a clear vision and engaging others towards the possibilities, and close-mindedly ramming one idea, one way down everyone’s throats.

Arguable, if you feel you have no choice but to hard-sell and defend your vision at every single step, you don't truly believe in it anyway. True belief in an idea comes with a sense of calm confidence, it opens you up to genuinely listen to other viewpoints.