Sri Aurobindo
Letters on Yoga
3. Religion, Morality, Idealism and Yoga
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The spiritual life (adhyātma-jīvana), the religious life (dharma-jīvana) and the ordinary human life of which morality is a part are three quite different things and one must know which one desires and not confuse the three together. The ordinary life is that of the average human consciousness separated from its own true self and from the Divine and led by the common habits of the mind, life and body which are the laws of the Ignorance. The religious life is a movement of the same ignorant human consciousness, turning or trying to turn away from the earth towards the Divine, but as yet without knowledge and led by the dogmatic tenets and rules of some sect or creed which claims to have found the way out of the bonds of the earth-consciousness into some beatific Beyond. The religious life may be the first approach to the spiritual, but very often it is only a turning about in a round of rites, ceremonies and practices or set ideas and forms without any issue. The spiritual life, on the contrary, proceeds directly by a change of consciousness, a change from the ordinary consciousness, ignorant and separated from its true self and from God, to a greater consciousness in which one finds one’s true being and comes first into direct and living contact and then into union with the Divine. For the spiritual seeker this change of consciousness is the one thing he seeks and nothing else matters.
Morality is a part of the ordinary life; it is an attempt to govern the outward conduct by certain mental rules or to form the character by these rules in the image of a certain mental ideal. The spiritual life goes beyond the mind; it enters into the deeper consciousness of the Spirit and acts out of the truth of the Spirit. As for the question about the ethical life and the need to realise God, it depends on what is meant by fulfilment of the objects of life. If an entry into the spiritual consciousness is part of it, then mere morality will not give it to you.
Politics as such has nothing to do with the spiritual life. 
If the spiritual man does anything for his country, it is in order to do the will of the Divine and as part of a divinely appointed work and not from any other common human motive. In none of his acts does he proceed from the common mental and vital motives which move ordinary men but acts out of the truth of the Spirit and from an inner command of which he knows the source.
The kind of worship (pūjā) spoken of in the letter belongs to the religious life. It can, if rightly done in the deepest religious spirit, prepare the mind and heart to some extent but no more. But if worship is done as a part
of meditation or with a true aspiration to the spiritual reality and the spiritual consciousness and with the yearning for contact and union with the Divine, then it can be spiritually effective.
If you have a sincere aspiration to the spiritual change in your heart and soul, then you will find the way and the Guide. A mere mental seeking and questioning are not enough to open the doors of the Spirit.
Current publication:
Sri Aurobindo. Letters on Yoga // SABCL.- Volume 22. (≈ 28 vol. of CWSA).- Pondicherry: Sri Aurobindo Ashram, 1971.- 502 p.
Other publications:
Sri Aurobindo. Letters on Yoga. I // CWSA.- Volume 28. (≈ 22 vol. of SABCL).- Pondicherry: Sri Aurobindo Ashram, 2012.- 590 p.
Sri Aurobindo. Letters of Sri Aurobindo: In 4 Series.- First Series [On Yoga].- Bombay: Sri Aurobindo Sircle, 1947.- 416 p.