To obtain the knowledge of the Divine Self (Brahman), the
first requisite is spiritual practice. The first practice that
must be done is service to the real teacher (Sadguru), with
full faith and full submission. When the sound "horse" is heard,
the form of the horse, presents itself before the mind.
Similarly, to an aspirant, when the word "Brahman" is uttered, the
nature of the "Brahman" should come into the consciousness. To
be stabilized in this practice, the aspirant should cultivate control
of senses and passions, and possess the attitude of acting without any
desire for the fruits of the action.
-Divine Discourse,
Prasanthi Vahini.