It is an axiomatic fact that while you meditate you are speaking with your own spirit. In that state of mind you put certain questions to your spirit and the spirit answers: the light breaks forth and the reality is revealed.
You cannot apply the name ‘man’ to any being void of this faculty of meditation; without it he would be a mere animal, lower than the beasts.
Through the faculty of meditation man attains to eternal life; through it he receives the breath of the Holy Spirit—the bestowal of the Spirit is given in reflection and meditation.
The spirit of man is itself informed and strengthened during meditation; through it affairs of which man knew nothing are unfolded before his view. Through it he receives Divine inspiration, through it he receives heavenly food.
Meditation is the key for opening the doors of mysteries. In that state man abstracts himself: in that state man withdraws himself from all outside objects; in that subjective mood he is immersed in the ocean of spiritual life and can unfold the secrets of things-in-themselves. To illustrate this, think of man as endowed with two kinds of sight; when the power of insight is being used the outward power of vision does not see.
This faculty of meditation frees man from the animal nature, discerns the reality of things, puts man in touch with God.
This faculty brings forth from the invisible plane the sciences and arts. Through the meditative faculty inventions are made possible, colossal undertakings are carried out; through it governments can run smoothly. Through this faculty man enters into the very Kingdom of God.
Bahá'í Reference Library - Paris Talks, Pages 173-176