Do you process things visually? Do you need to see it on paper, drawn out, or on a whiteboard?
Do you need to hear it? Do you love audio-books and lectures? Do you speak slowly and clearly?
Do you need to feel it? Do you need to observe the way the person moves their face when they tell you something? Do you sense the tone in their voice?
Now, remember that the other person your about to talk to may prefer 1 of the 3 modes which you do not.
If you can speak to them in their preferred language, you’re almost guaranteed to be understood.