Listening to the other side

Whatever may have happened in your past, you have to find a way to get past your triggers and see that you're in a new situation with a person who doesn't mean you harm. What's triggered is usually fear and awareness of one's limitations.

Look for common ground. When you concentrate on differences the space grows wider, but when you seek out what you have in common it helps bridge the gap.

You may decide to hold off voicing your opinion if you want to gather your army first. People can contribute experience or information to your thinking — all the things that would make the disagreement stronger or more valid. 

Also, delay the conversation if you’re in a meeting or other public space. Discussing the issue in private will make the powerful person feel less threatened.

Before you share your thoughts, think about what the powerful person cares about. You’re more likely to be heard if you can connect your disagreement to a “higher purpose.” 

State it overtly then, contextualizing your statements so that you’re seen not as a disagreeable underling but as a colleague who’s trying to advance a shared goal.