What can I do if sometimes I am angry or upset and don't feel like meditating? Is it okay to do selfless service instead?
Certainly. If your mental agitation has not affected your physical body, at that time, if you feel that you can work devotedly, you should. When you work for the Supreme, at that time you are doing meditation in the physical. You have a body, vital, mind and heart. If you cannot meditate in all parts of your being, then try to meditate in at least one part. But if all the parts of your being-physical, vital, mental and psychic-work together devotedly, then that is the best form of meditation.Next question and answer