Rest is potential energy. More the rest, more the kinetic potential. Just like if you rest more deeply at night, you will have more energy during the day. Similarly when the ‘personal will’ is resting, it accumulates potential and becomes much more powerful. When your life is out of alignment with the universal force, your ‘personal will’ is burdened and just replenishes to a break-even point in every rest cycle. So its like a hand to mouth existence, no energy is really accumulated. The way to unlimited energy and abundance is complete alignment with the universal. In all other cases, depending upon the degree of misalignment, your energy tends to get exhausted quicker.
To witness infinite potential, you would have to reach infinite rest because rest IS potential itself.