Premanand Maharaj Ji
What is the greatest seva I can offer my Guru?
Obeying the Guru's command is the highest seva
No seva equals obeying your Guru's command. Massaging his feet, bathing him, washing his clothes and feeding him do not awaken ras and reeti in the heart without it.
Obeying his command. There is no seva equal to obeying your master's command.