Oneness

Advaita bhavana or Oneness is a difficult feeling to understand for a person who is having Dvaita bhavana or duality. This is a description of Oneness coming from Prabhu which I gleaned from him in a casual talk.
Panchabhoota (earth, water, fire, air, space) are one. We divide them into many. We divide land. When water is in a pot it appears different to us from the water in river. The fire that burns in our fireplace appears different from the fire in forest. But in reality they are one.
Similarly mind is one. Its function of raising thoughts, desires, and wants is one in nature. There is only one mind, that appears many.
Similarly the intellect is one. The function of intellect is to judge and take decisions. There is only one intellect, that appears many.
Similarly Atma is one. It appears many because of the containers being different.
This is the oneness and Advaita bhavana.