Peace and love go hand-in-hand. They are supposed to be our basic state. When we are not perturbed by something, we are at peace - the default condition. When our mind is not agitated by something, we are at peace and willing to look at other people with sympathy and love - the default feeling.
To be perturbed, first we have to want something, be attached to something. Then depending on whether we get it or not, or whether we get enough of it, who else has it, the nature and degree of our perturbation varies. These categories of perturbation (or distortions) are called ripus in the shashtras. There are six of them, which can be loosely described as follows in terms of attachment.
Kama - attachment for something I do not have (lust).
Krodha - attachment for something not happening my way(anger).
Lobha - attachment for more of what I have (greed).
Moha - attachment for what I have right now; I'll not let it go (possessiveness).
Madh - attachment for my own qualities; I'm a great guy (pride).
Matsarjya - attachment for someone else's qualities; wish I was like that (envy).
It is roughly in the descending order of ease of handling -- it is easiest to conquer envy and most difficult to conquer lust.
These perturbations drive away peace. These distortions twist love into something else. These waves play havoc with our value system and compromise human values like kindness and generosity. It is against these ripus that our power of discrimination is required. Discrimination recognises that these are twisted crust on the surface of our peaceful mind, and that recognition helps to soften the crust and dissolve it.
