When you are discontent, you always want more, more, more. Your desire can never be satisfied. But when you practice contentment, you can say to yourself, 'Oh yes - I already have everything that I really need.'
I have done one thing that I think is a contribution: I helped Buddhist science and modern science combine. No other Buddhist has done that. Other lamas, I don't think they ever pay attention to modern science. Since my childhood, I have a keen interest.
As a human being, anger is a part of our mind. Irritation also part of our mind. But you can do - anger come, go. Never keep in your sort of - your inner world, then create a lot of suspicion, a lot of distrust, a lot of negative things, more worry.
There are techniques of Buddhism, such as meditation, that anyone can adopt. And, of course, there are Christian monks and nuns who already use Buddhist methods in order to develop their devotion, compassion, and ability to forgive.