During one of these discourses on Sunday, January 12th, (1930) Baba further explained the significance of the number seven:
The evolution of creation has seven stages. There are seven planes and seven types of desires. All these sevens should be eradicated once and for all.
However, the number seven is significant. There are seven types of sanskaras, seven types of colors, seven types of flights of imagination and seven types of sounds. The reason all these have seven variations is that in the beginning of creation – with the start of the original whim in the Beyond, Beyond state of God – there was a clash between Matter (Akash) and Energy (Pran), and Energy’s powers were divided into seven forces.
The original sound coming out of the Creation, or Om Point, also turns into seven sounds. This higher music of the mental and subtle planes is indescribably sweet. Even if you listened to it for twenty-four hours without a break, you would not tire of it. It is enrapturing; one absolutely drowns in its melody. But remember that in the mental and subtle sphere, the sweetness of this music’s sounds are only shadows of the Original Sound.
In the gross world, the shadow of this melody is again divided into seven parts; only expert singers can express these tones and octaves. Sound is created by contact between two things. When you speak, your voice passes through seven veils; but you do not notice this because the sound comes so quickly. Your physique, a by-product of your sanskaras, determines whether your voice is sweet or harsh.
Everything is made up of seven: seven sub-divisions of the first subtle plane (the astral), seven stages of evolution, seven planes and seven heavens in involution.
Lord Meher, Original Publication, Bhau Kalchuri, Vol. 4, pp. 1263 – 1264.