I have never said that there is no need for a guru. All depends on what you call guru. He need not be in a human form.
Even as one and the same person is called by different names according to the different functions he performs, so also one and the same mind is called by the different names: mind, intellect, memory, and egoity, on account of the difference in the modes - and not because of any real difference.
The Self is self-luminous without darkness and light, and is the reality which is self-manifest. Therefore, one should not think of it as this or as that. The very thought of thinking will end in bondage.
The means that make one qualified for enquiry are meditation, yoga, etc. One should gain proficiency in these through graded practice and thus secure a stream of mental modes that is natural and helpful.
Like the practice of breath control, meditation on the forms of God, repetition of mantras, food restrictions, etc., are but aids for rendering the mind quiescent.
That which comes and goes, rises and sets, is born and dies is the ego. That which always abides, never changes, and is devoid of qualities is the Self.
As instruments for knowing the objects, the sense organs are outside, and so they are called outer senses; and the mind is called the inner sense because it is inside. But the distinction between inner and outer is only with reference to the body; in truth, there is neither inner nor outer. The mind's nature is to remain pure like ether.