Words can never mean the same!

Spay: Why don't you always speak your heart 
Leo: I like English better than 'Your Heart'
Leo(Unspoken): Words can never mean what I feel

Better judgement

Penny: Listen to your Heart, It somehow knows what is right

Leo: Yeah Maybe

Leo(Unspoken): Never! Heart just betrays better judgement.

Chances

Leo: It's like when you know history is being repeated but you still want to take chances.

Leo(Drained): Don't take chances , it's just a loop