One alphabet, one word, one sound can take you to the state of estcasy

Sound = Vibration = Colour = Energy

Sound is the denser form of vibration

Sri Guru Granth Sahib ji says,

Ek Akhar har man bast, Nanak hot nihaal.

Akhar Mai tribhavan prabh dhare...... P261 sggs

Meaning three worlds are created by/ within the word.