" ... Bahá’u’lláh has appeared and so resuscitated spirits that they have manifested powers more than human."

... "The point is this: that to gain control over physical bodies is an extremely easy matter, but to bring spirits within the bonds of serenity is a most arduous undertaking. This is not the work of everybody. It necessitates a divine and holy potency, the potency of inspiration, the power of the Holy Spirit. For example, Christ was capable of leading spirits into that abode of serenity. He was capable of guiding hearts into that haven of rest. From the day of His manifestation to the present time He has been resuscitating hearts and quickening spirits. He has exercised that vivifying influence in the realm of hearts and spirits; therefore, His resuscitating is everlasting.

In this century of the latter times Bahá’u’lláh has appeared and so resuscitated spirits that they have manifested powers more than human. Thousands of His followers have given their lives; and while under the sword, shedding their blood, they have proclaimed, “Yá Bahá’u’l-Abhá!” Such resuscitation is impossible except through a heavenly potency, a supernatural power, the divine power of the Holy Spirit. Through a natural and mere human power this is impossible. Therefore, the question arises: How is this resuscitation to be accomplished?

There are certain means for its accomplishment by which mankind is regenerated and quickened with a new birth. This is the second birth mentioned in the heavenly Books. Its accomplishment is through the baptism of the Holy Spirit. The resuscitation or rebirth of the spirit of man is through the science of the love of God. It is through the efficacy of the water of life. This life and quickening is the regeneration of the phenomenal world. After the coming of the spiritual springtime, the falling of the vernal showers, the shining of the Sun of Reality, the blowing of the breezes of perfection, all phenomena become imbued with the life of a new creation and are reformed in the process of a new genesis. Reflect upon the material springtime. When winter comes, the trees are leafless, the fields and meadows withered, the flowers die away into dustheaps; in prairie, mountain and garden no freshness lingers, no beauty is visible, no verdure can be seen. Everything is clad in the robe of death. Wherever you look around, you will find the expression of death and decay. But when the spring comes, the showers descend, the sun floods the meadows and plains with light; you will observe creation clad in a new robe of expression. The showers have made the meadows green and verdant. The warm breezes have caused the trees to put on their garments of leaves. They have blossomed and soon will produce new, fresh and delightful fruits. Everything appears endowed with a newness of life; a new animus and spirit is everywhere visible. The spring has resuscitated all phenomena and has adorned the earth with beauty as it willeth." ...

`Abdu'l-Bahá, The Promulgation of Universal Peace, pp. 277-278 

25 August 1912 
(excerpt from) Talk at the New Thought Forum Metaphysical Club 
Boston, Massachusetts