In this weeks meditation exercise, Sri Chinmoy offers some simple breathing techniques for the development of purity, peace, power and joy. Remember to practice these exercises according to your own capacity. If you push or pull too hard beyond your limitations, you may become frustrated and discouraged. Your capacity will increase naturally over time as you continue to practice these simple meditation exercises.

The first thing that you have to think of when breathing is purity. When you breathe in, if you can feel that the breath is coming directly from God, from Purity itself, then your breath can easily be purified.
Then, each time you breathe in, try to feel that you are bringing into your body peace, infinite peace. The opposite of peace is restlessness. When you breathe out, try to feel that you are expelling the restlessness within you and also the restlessness that you see all around you. When you breathe this way, you will find restlessness leaving you.
After practising this for a few times, please try to feel that you are breathing in power from the universe. And when you exhale, feel that all your fear is coming out of your body.
After doing this a few times, try to feel that what you are breathing in is joy, infinite joy, and what you are breathing out is sorrow, suffering and melancholy. (Source: Meditation: Man-Perfection In God-Satisfaction)

Purity you want?
Just imagine breathing in the beauty,
Purity and fragrance of a flower.
– Sri Chinmoy