There's a popular say that goes: when all were praising the peacock’s tail, the birds protested: “But look at his feet”.
The envious person is the one who likes to spoil other’s happiness.
It is the person who always has a “but” to diminish someone around her, as if the other person’s success would hurt or diminish hers.
When we feel like saying “but” it is better to ask ourselves: why do I want to play the different or the contradictory one?
Is there a plausible reason or is it just to manifest a little bit of my envy or unhappiness?