Beware, your inner energy is not limitless, think about recharging : Resting is important, you can also use grounding techniques.

On this point I will disagree. While grounding and rest are necessary, it is not due to a lack of energy. Every particle of creation is composed of pure energy. Einstein's e=mc^2. Even in a vacuum of empty space particles are popping in and out of existence which shows that even a vacuum is full of energy. The only limit is what the practitioner feels to be their limit.

The purpose of grounding then becomes a practice to bring the mage to the centre of their being, or the centre of creation as I see it, to balance the energies within oneself and the greater collective conscience, and creating homeostasis of that which is outside and that which is within the mage.