Every day we have plenty of opportunities to get angry, stressed or offended. But what you're doing when you indulge these negative emotions is giving something outside yourself power over your happiness. You can choose to not let little things upset you.
Some days, 24 hours is too much to stay put in, so I take the day hour by hour, moment by moment. I break the task, the challenge, the fear into small, bite-size pieces. I can handle a piece of fear, depression, anger, pain, sadness, loneliness, illness. I actually put my hands up to my face, one next to each eye, like blinders on a horse.
I don't think that you can fake warmth. You can fake lust, jealousy, anger; those are all quite easy. But actual, genuine warmth? I don't think you can fake it.
Anybody can become angry - that is easy, but to be angry with the right person and to the right degree and at the right time and for the right purpose, and in the right way - that is not within everybody's power and is not easy.
The only justice is to follow the sincere intuition of the soul, angry or gentle. Anger is just, and pity is just, but judgement is never just.