Our energy is coming from God, recycle it back to him!

Everyone’s energy is generated or borrowed from the reservoir of energy of the Lord; therefore, the resultant actions of such energy must be given to the Lord in the shape of transcendental loving service for Him. As the rivers draw water from the sea through the clouds and again go down to the sea, similarly our energy is borrowed from the supreme source, the Lord’s energy, and it must return to the Lord. That is the perfection of our energy.

– Srila Prabhupada, Srimad Bhagavatam 1.9.27 purport