"Unflinching devotion to the Teacher is paramount in the life of a true seeker. To begin with, an external God can be the object of faith. But once the devotee grows to be a seeker, only a Wise Teacher can fulfil his quest. It is then for the seeker to get purified and enlightened by the words of wisdom from his Guru. Their bond and attunement put the Teacher on the pedestal of God. Such an impeccable Guru-sishya bond alone bestows wisdom, strength and fulfillment to the seeker."
The Guiding force of Narayanashrama Tapovanam & Center for Inner Resources Development
Sanskrit: साधना; a sādhaka (spiritual aspirant) undertakes a pursuit (sādhanā) to attain the fruition (siddhi's). Generally speaking sādhanā is a discipline or dedicated effort undertaken in the pursuit of a goal, liberation in this case.