Energy is nonrenewable and renewable.
On a daily basis, energy is nonrenewable. We have limited energy in a day. We need to sleep to charge our battery.
On a long-term basis, energy is renewable. Every night we go to sleep, we charge our battery. The next morning we wake up with a full battery. This cycle repeats itself until the day we die.
Although we run out of energy on a daily basis, we have an abundant amount of energy over the course of a lifetime.
Energy is an asset. Energy is a precious resource. Get the most out of your energy.