Question: How to know the if the service a disciple is doing is pleasing to the guru? Or he/she has to always be trying to expand this service? This is in relation with the teaching of giving the guru milk, instead of water that the guru wants.

Jayapataka Swami: What the guru is asking for, one should give that. If the guru wants water and he gives milk, that is not fulfilling his desire. So if you are doing a service which the guru has told you to, then there is no problem. If you have a doubt, if the guru is in this world, you can ask him. If your guru is not then, you can see whether you are following his instruction, or talk to some senior devotee, and see if what you are doing is alright.
22-FEBRUARY-2020 SRI MAYAPUR DHAM, INDIA