Sri Aurobindo
Bases of Yoga
Bases of Yoga
The whole principle of this Yoga is to give oneself entirely to the Divine alone and to nobody and nothing else, and to bring down into ourselves by union with the Divine Mother-Power all the transcendent light, force, wideness, peace, purity, truth-consciousness and Ananda of the supramental Divine. In this Yoga, therefore, 
there can be no place for vital relations or interchanges with others; any such relation or interchange immediately ties down the soul to the lower consciousness and its lower nature, prevents the true and full union with the Divine and hampers both the ascent to the supramental Truth-consciousness and the descent of the supramental Ishwari Shakti. Still worse would it be if this interchange took the form of a sexual relation or a sexual enjoyment, even if kept free from any outward act; therefore these things are absolutely forbidden in the sadhana. It goes without saying that any physical act of the kind is not allowed; but also any subtler form is ruled out. It is only after becoming one with the supramental Divine that we can find our true spiritual relations with others in the Divine; in that higher unity this kind of gross lower vital movement can have no place.
To master the sex-impulse,— to become so much master of the sex-centre that the sexual energy would be drawn upwards, not thrown outwards and wasted — it is so indeed that the force in the seed can be turned into a primal physical energy supporting all the others, retas into ojas. But no error can be more perilous than to accept the immixture of the sexual desire and some kind of subtle satisfaction of it and look on this as a part of the sadhana. It would be the most effective way to head straight towards spiritual downfall and throw into the atmosphere forces that would block the supramental descent, bringing instead the descent of adverse vital powers to disseminate disturbance and disaster. This deviation must be absolutely thrown away, should it try to occur and expunged from the consciousness, if the Truth is to be brought down and the work is to be done.
It is an error too to imagine that, although the physical sexual action is to be abandoned, yet some inward reproduction of it is part of the transformation of the sex-centre. The action of the animal sex-energy in Nature is a device for a particular purpose in the economy of the material creation in the Ignorance. But the vital excitement that accompanies it makes the most favourable opportunity and vibration in the atmosphere for the inrush of those very vital forces and beings whose whole business is to prevent the descent of the supramental Light. The pleasure attached to it is a degradation and not a true form of the divine Ananda. The true divine Ananda in the physical has a different quality and movement and substance; self-existent in its essence, its manifestation is dependent only on an inner union with the Divine. You have spoken of Divine Love; but Divine Love, when it touches the physical, does not awaken the gross lower vital propensities; indulgence of them would only repel it and make it withdraw again to the heights from which it is already difficult enough to draw it down into the coarseness of the material creation which it alone can transform. Seek the Divine Love through the only gate 
through which it will consent to enter, the gate of the psychic being, and cast away the lower vital error.
The transformation of the sex-centre and its energy is needed for the physical siddhi; for this is the support in the body of all the mental, vital and physical forces of the nature. It has to be changed into a mass and a movement of intimate Light, creative Power, pure divine Ananda. It is only the bringing down of the supramental Light, Power and Bliss into the centre that can change it. As to the working afterwards, it is the supramental Truth and the creative vision and will of the Divine Mother that will determine it. But it will be a working of the conscious Truth, not of the Darkness and Ignorance to which sexual desire and enjoyment belong; it will be a power of preservation and free desire-less radiation of the life-forces and not of their throwing out and waste. Avoid the imagination that the supramental life will be only a heightened satisfaction of the desires of the vital and the body; nothing can be a greater obstacle to the Truth in its descent than this hope of glorification of the animal in the human nature. Mind wants the supramental state to be a confirmation of its own cherished ideas and preconceptions; the vital wants it to be a glorification of its own desires; the physical wants it to be a rich prolongation of its own comforts and pleasures and habits. If it were to be that, it would be only an exaggerated and highly magnified consummation 
of the animal and the human nature, not a transition from the human into the Divine.
It is dangerous to think of giving up “all barrier of discrimination and defence against what is trying to descend” upon you. Have you thought what this would mean if what is descending is something not in consonance with the divine Truth, perhaps even adverse? An adverse Power would ask no better condition for getting control over the seeker. It is only the Mother’s force and the divine Truth that one should admit without barriers. And even there one must keep the power of discernment in order to detect anything false that comes masquerading as the Mother’s force and the divine Truth, and keep too the power of rejection that will throw away all mixture.
Keep faith in your spiritual destiny, draw back from error and open more the psychic being to the direct guidance of the Mother’s light and power. If the central will is sincere, each recognition of a mistake can become a stepping-stone to a truer movement and a higher progress.