No theoretical knowledge ever helps and no anatomical visualization of kundalini is really meaningful for meditation. When I say this I do not mean that there is nothing like kundalini or chakras. Kundalini is there, chakras are there, but no knowledge helps in any way. Rather, it can hinder. It can become a barrier for so many reasons.
One reason is that any knowledge about kundalini or about esoteric paths of bioenergy – the inner paths of Elan vital – is generalized. It differs from individual to individual; the root is not going to be the same. With A it will be different, with B it will be different, with C it will be different. Your inner life has an individuality, so when you acquire something through theoretical knowledge it is not going to help – it may hinder – because it is not about you. It cannot be about you. You will only know about yourself when you go within.
There are chakras, but the number differs with each individual. One may have seven, one may have nine; one may have more, one may have less. That is the reason why so many different traditions have developed. Buddhists talk of nine chakras, Hindus talk of seven, Tibetans talk of four – and they are all right!
The root of kundalini, the passage through which kundalini passes, is also different with each individual. The more you go in, the more individual you are. For instance, in your body your face is the most individual part, and in the face the eyes are even more individual. The face is more alive than any other part of the body; that is why it takes on an individuality. You may not have noticed that with a particular age – particularly with sexual maturity – your face begins to assume a shape that will continue, more or less, for the whole life. Before sexual maturity the face changes much, but with sexual maturity your individuality is fixed and given a pattern, and now the face will be more or less the same.
The eyes are even more alive than the face, and they are so individual that every moment they change. Unless one attains enlightenment, the eyes are never fixed. Enlightenment is another kind of maturity.
With sexual maturity the face becomes fixed, but there is another maturity where the eyes become fixed. You cannot see any change in Buddha’s eyes: his body will grow old, he will die, but his eyes will continue to be the same. That has been one of the indications. When someone attains nirvana, the eyes are the only door by which outsiders can know whether the man has really attained it. Now the eyes never change. Everything changes, but the eyes remain the same. Eyes are expressive of the inner world.
But kundalini is still deeper.