Question: How can we create more energy inside ourselves so we can aspire more?

Sri Chinmoy: While you are breathing you have to imagine and feel that an abundance of life-energy is entering into you. Life-energy is nothing but aspiration. You know how much air you are allowing your body to accept while you are inhaling. If you feel that a certain amount of breath you are inhaling in the normal way, then while you are meditating you have to feel that each breath that you are breathing in is at least ten times larger than usual. This breath creates an abundant supply of energy. When you are consciously trying to bring in more energy, you have to feel that a surplus, an abundant supply of energy is entering. This energy is nothing but aspiration, an immediate increase of aspiration.
Sri Chinmoy, Aspiration-Tree, Aum Publications, 1976