Creation is the expression of motion. Motion is life. A moving object is a living object, whereas that which is motionless and inert is as dead. All created forms are progressive in their planes, or kingdoms of existence, under the stimulus of the power or spirit of life. The universal energy is dynamic. Nothing is stationary in the material world of outer phenomena or in the inner world of intellect and consciousness.

‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 140

Exert your energy in accomplishing what ye have undertaken, so that this glorious Temple may be built, that the beloved of God may assemble therein and that they may pray and offer glory to God for guiding them to His Kingdom.

‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v1, p. 18

The body of man is in need of physical and mental energy but his spirit requires the life and fortification of the Holy Spirit.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 241

We must strive unceasingly and without rest to accomplish the development of the spiritual nature in man, and endeavor with tireless energy to advance humanity toward the nobility of its true and intended station. For the body of man is accidental; it is of no importance. The time of its disintegration will inevitably come. But the spirit of man is essential and therefore eternal. It is a divine bounty. It is the effulgence of the Sun of Reality and therefore of greater importance than the physical body.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 262-263

Suffering will increase our energy in setting before humanity the road to salvation, it will move us from our repose for we are far from doing our best in teaching the Cause and conveying the Message with which we have been entrusted.

Shoghi Effendi, Lights of Guidance, p. 134

The energy we expend in enduring the intolerance of some individuals of our community is not lost. It is transformed into fortitude, steadfastness and magnanimity.

Shoghi Effendi, Lights of Guidance, p. 603

The old believers have to give up something of their old conceptions and ways of working in order to better adapt themselves to the changing social conditions and circumstances . . . The old and the young have each something specific to contribute to the progress and welfare of the Bahá’í community The energy of youth should be tempered and guided by the wisdom of old age.

Shoghi Effendi, Lights of Guidance, p. 638-639

Let them step forth to take their places in the arena of service where their talents and skills, their specialized training, their material resources, their offers of time and energy and, above all, their dedication to Bahá’í principles, can be put to work in improving the lot of man.

Universal House of Justice, Lights of Guidance, p. 546

They should concentrate every ounce of energy on the winning of the goals . . . which they have clearly before them, confident in the knowledge that whatever may happen in the world, however calamitous it may outwardly appear, will promote God's unalterable purpose for the unification of mankind.

Universal House of Justice, Lights of Guidance, p. 128