Without Sage Sankara there is no Advaita.+

India is the home of mysticism and deification and very few are keen on rational Advaitic truth. Indian populace is most interested in their caste and creed propagated by different founders in different regions of India.  Very few are interested in Advaitic wisdom. The Atmic path has no place for an extra-cosmic God or for anything supernatural. 

Without Sage Sankara, there is no Advaita. Without Advaita,  it is impossible to realize the truth, which is beyond form, time, and space.

Sage Sankara’s whole wisdom can be summed up in one sentence, ‘There is nothing else but Brahman. He says that Absolute Existence, Absolute Knowledge, and Absolute Bliss are real. The universe is not real. He says that Brahma and Atman are one. The ultimate and the Absolute Truth is the Self, which is one though appearing as many different individuals. The individual has no reality. Only the Self is real; the rest, mental and physical are but passing appearances. 

Genuine philosophy must be independent of religion, that in Sage Sankara himself the Saguna Brahman or a personal God is only a part of the phenomenal (if not illusory) world, and the Nirguna Brahman is the only reality and has nothing to do with religion.  

Sage Sankara pokes fun at ascetics and points out that all their austerities do not cause desires to go (Altar Flowers" Page 205, v.2 P.207 v.4)

The Brahma Sutras together with  Sage Sankara's commentary thereon do not contain the higher wisdom. They are intended for those who are incapable of thinking rationally.

Sage Sankara's commentary on the Brahma Sutras is not on a philosophical basis, but on an orthodox and mystic basis, with an appeal to the Vedas as a final authority.

In Brahma Sutra Sage Sankara takes the position that there is another entity outside us, i.e. the wall really exists separately from the mind. This was because Sage  Sankara explains in Manduka that those who study the Sutras are orthodox minds, intellectual children, hence his popular viewpoint to assist them. These people are afraid to go deeper because it means being heroic enough to refuse to accept Sruti, and God's authority, in case they mean punishment by God.  A Gnani says the scriptures for children, but wise seekers will think rationally.

In Brahma Sutras Sage Sankara takes for granted, and assumes that a world was created: He there mixes dogmatic theology with philosophy.

That God created the world is an absolute lie, nevertheless one will find Sage  Sankara (in his commentary on Vedanta Sutras) clearly says this! He has to adapt his teachings to his audience, reserving the highest for philosophical minds.

The text of Brahma Sutras is based on religion and dogmatism, but in the commentary Sage Sankara cleverly introduced some philosophy. If it is objected that a number of Upanishads are equally dogmatic because they also begin by assuming Brahman, only a few Upanishads do not but prove Brahman at the end of a train of proof.

Scholars' translation of Brahma Sutras in Sacred Books of East must be read cautiously as he has not understood its highest sense, e.g. for Advaita, they wrongly put "Unity" instead of “Non-duality."

Sage Sankara gave religion and scholasticism and yoga no less than philosophy, to the seeking world. He was great enough to be able to do so. His commentary on Manduka Upanishad is pure philosophy, but many of his other books are presented from a religious standpoint to help those who cannot rise up to philosophy.

Orthodoxy is the home of mysticism and deification that is why they are not the keen rational truth. Thus, Sage  Sankara is the Jagadguru to the religious followers and he is a great Sage (Gnani) of the highest order to the seeking world. :~Santthosh Kumaar