a) with your words or
b) with how you say those words or
c) with your body language or
d) with what you choose not to talk about

A pause can make a big difference. In fact, it can change the meaning of what you say. Here are two versions of the same sentence with a pause at different places. Look at how the sentence has changed its meaning completely in version 2.

Version 1:
The boss said <pause> his employee was furious

Version 2:
The boss <pause> said his employee <pause> was furious

Try saying “I really love you” to someone with a frown. Does it even make sense to do that?

Intonation in simple terms is what you stress on when you speak. It can, again, make a sea change in the meaning of what you say. Here is a something from a classic book on presentation skills “Lend Me Your Ears” by Max Atkinson.

Note: Bold and Italicized words are the ones that are stressed.

What you said: I didn’t say you stole my red hat.
What is implied: But someone else might have said it.

What was said: I didn’t say you stole my red hat.
What was implied: I deny that I said it.

What was said: I didn’t say you stole my red hat.
What was implied:I may have thought or implied it.

What was said: I didn’t say you stole my red hat.
What was implied: I said someone else stole it.

What was said: I didn’t say you stole my red hat.
What was implied: I said you did something else with it.

What was said: I didn’t say you stole my red hat.
What was implied: I said you stole someone else’s red hat.

What was said: I didn’t say you stole my red hat.
What was implied: I said you stole my green hat.

What was said: I didn’t say you stole my red hat.
What was implied: I said you stole my red scarf.