What convinces is conviction. Believe in the argument you're advancing. If you don't you're as good as dead. The other person will sense that something isn't there, and no chain of reasoning, no matter how logical or elegant or brilliant, will win your case for you.
“Wherever there is a human being, I see God-given rights inherent in that being, whatever may be the sex or complexion.”
“I like doing food as a focal point on my table. It is not like going out and buying flowers or candles, which are expensive.”