The 4 principles to effectively communicate complex concepts:
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Everyone's got a different background, everyone's got a different set of knowledge, and it's our job to explain the information in terms that they already understand.
As you start to explain, ask questions like "Is this making any sense?" And don't worry too much about whether you're telling the audience something they've already heard before.
Focus on the bigger picture, instead of explaining in length every nitty-gritty detail, which people will find hard to absorb.
Too much information can dilute your message.
Being extremely accurate isn't that important as being clear, concise and simple.
A basic understanding of a concept, if done right, can later be built upon for a more comprehensive picture.
Personalize your subject by letting the listener know why you think it is cool.
Show your enthusiasm, and your motivation. They are contagious.
There is a natural tendency in humans to avoid tough conversations, due to the fear of conflict.
But sometimes it is necessary to have these conversations, as postponing them can make the situation worse.
Match your gestures to your words.
We are visual creatures, and any movement used in the right way in this direction will spark the attention of your audience. Just try not to abuse this rule.
The age-old tactic of misdirection is employed to distract us from the real issue. Companies and governments even implement it: they release bad news on Fridays or before major holidays with the hope that the weekend will distract us from focussing on the issue.