If thou art desiring the refulgent light, add to thy love for God. If thou art begging for the breaths of the Holy Spirit, become thou engaged in the commemoration of the Beauty of ABHA. If thou art seeking everlasting glory, choose humility in the path of the True One. If thou art aspiring to eternal life, sacrifice thy soul in the way of God.

‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v1, p. 214

In all the action or inaction of man, he receives power from the help of God; but the choice of good or evil belongs to the man himself.

‘Abdu’l-Bahá, Some Answered Questions, p. 249

Sterile soil will produce nothing, even if the cloud of mercy pours rain upon it a thousand years. We must make the soil of our hearts receptive and fertile by tilling in order that the rain of divine mercy may refresh them and bring forth roses and hyacinths of heavenly planting. We must have perceiving eyes in order to see the light of the sun. We must cleanse the nostril in order to scent the fragrances of the divine rose garden. We must render the ears attentive in order to hear the summons of the supreme Kingdom. No matter how beautiful the melody, the ear that is deaf cannot hear it, cannot receive the call of the Supreme Concourse. The nostril that is clogged with dust cannot inhale the fragrant odors of the blossoms. Therefore, we must ever strive for capacity and seek readiness. As long as we lack susceptibility, the beauties and bounties of God cannot penetrate.

‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 148-149

Act as though it had all been answered. Then act with tireless, ceaseless energy. And as you act, you, yourself, will become a magnet, which will attract more power to your being, until you become an unobstructed channel for the Divine power to flow through you.

Shoghi Effendi, Principles of Bahá’í Administration, p. 91

It is not sufficient to pray diligently for guidance, but this prayer must be followed by meditation as to the best methods of action and then action itself. Even if the action should not immediately produce results, or perhaps not be entirely correct, that does not make so much difference, because prayers can only be answered through action and if someone's action is wrong, God can use that method of showing the pathway which is right.

Shoghi Effendi, Guidelines for Teaching, p. 325

The opportunities which the turmoil of the present age presents, with all the sorrows which it evokes, the fears which it excites, the disillusionment which it produces, the perplexities which it creates, the indignation which it arouses, the revolt which it provokes, the grievances it engenders, the spirit of restless search which it awakens, must, in like manner, be exploited for the purpose of spreading far and wide the knowledge of the redemptive power of the Faith of Bahá’u’lláh, and for enlisting fresh recruits in the ever-swelling army of His followers. So precious an opportunity, so rare a conjunction of favorable circumstances, may never again recur.

Shoghi Effendi, The Advent of Divine Justice, p. 47

There is no time to lose. The hour is ripe for the proclamation, without fear, without reserve, and without hesitation, and on a scale never as yet undertaken, of the One Message that can alone extricate humanity from the morass into which it is steadily sinking, and from which they who claim to be the followers of the Most Great Name can and will eventually rescue it. The sooner they who labor for the recognition and triumph of His Faith in the new world arise to carry out these inescapable duties, the sooner will the hopes, the aims and objectives of ‘Abdu’l-Bahá as enshrined in His own Plan, be translated from the realm of vision to the plane of actuality and manifest the full force of the potentialities with which they have been endued.

Shoghi Effendi, Messages to America, p. 79

We Bahá’ís can always, with the aid of Bahá’u’lláh, Who, is ever ready to strengthen and assist us, turn our stumbling blocks into stepping stones, and utilize the often violent forces released by sincere but perhaps misguided friends, as a positive stream of power by turning them into productive channels instead of destructive ones.

Shoghi Effendi, Lights of Guidance, p. 602-603