(Srila Prabhupada in Nelson, B.C.—click to enlarge)
"The words guru-śuśrūṣayā mean that one should personally serve the spiritual master by giving him bodily comforts, helping him in bathing, dressing, sleeping, eating and so on. This is called guru-śuśrūṣaṇam. A disciple should serve the spiritual master as a menial servant, and whatever he has in his possession should be dedicated to the spiritual master. prāṇair arthair dhiyā vācā. Everyone has his life, his wealth, his intelligence and his words, and all of them should be offered to the Supreme Personality of Godhead through the via medium of the spiritual master. Everything should be offered to the spiritual master as a matter of duty, but the offering should be made to the spiritual master with heart and soul, not artificially to gain material prestige."