Spirit

Thy heart is My home; sanctify it for My descent. Thy spirit is My place of revelation; cleanse it for My manifestation.

Bahá’u’lláh, The Arabic Hidden Words 59

Follow thou the way of thy Lord, and say not that which the ears cannot bear to hear, for such speech is like luscious food given to small children. However palatable, rare and rich the food may be, it cannot be assimilated by the digestive organs of a suckling child.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 268

It has been before explained that spirit is universally divided into five categories: the vegetable spirit, the animal spirit, the human spirit, the spirit of faith, and the Holy Spirit. The vegetable spirit is the power of growth which is brought about in the seed through the influence of other existences. The animal spirit is the power of all the senses, which is realized from the composition and mingling of elements; when this composition decomposes, the power also perishes and becomes annihilated. It may be likened to this lamp: when the oil, wick, and fire are combined it is lighted, and when this combination is dissolved, that is to say, when the combined parts are separated from one another, the lamp also is extinguished. The human spirit which distinguishes man from the animal is the rational soul.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 316

Only the spirit is real; everything else is as shadow. All bodies are disintegrated in the end; only reality subsists. All physical perfections come to an end; but the divine virtues are infinite.

‘Abdu’l-Bahá, Divine Philosophy, p. 137

The human spirit which distinguishes man from the animal is the rational soul and these two names -- the human spirit and the rational soul -- designate one thing.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 316

The spirit however possesseth various grades and stations.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 337-338