I am confused about the idea of the soul or "atman". There is obviously an indestructible part of ourselves.

Is the soul SIMPLY the feeling of "I" because it seems like from the time i was an infant---> teenager----> adult---> etc, my knowledge and thoughts keep changing...but it is the feeling of "I" that doesn't change.

OR

is it a combination of the feeling of "I" combined with the ability to perceive


OR

is it the feeling of I combined with our consciousness because this seems to not make sense as i am a different person than when i was 3 for example. obviously if this is what the atman is, then it IS destructible, and changing constantly


Help me out i'm so confused