Volumes and volumes have been written
For those pure in heart all that is needed is a word from a Guru. Your the divine.
However, that purity is rare.
Ramkrishna achieved the highest in a few seconds from his Guru Totapuri. His guru wept. It took the Guru 40 years.
Yet Ramkrishna paid full respect to his Guru
So it is possible
However this simple fact gets murky. And many smaller steps are needed for the mind that desires many things in the world
That weak mind will again and again crave things. The same usual things. Food sex. Money. Fame. Oh I forgot SLEEP
As such none is needed for the pure consciousness
Bhavin