Lost in my Mind

Trying to find your way through,
You come across a block,
This block is blank, but you have a feeling of presence when it's there,
You walk up to it and slowly start to touch it,
Nothing happened at first but then you get these vigorous envisions of the past,
Standing there you are hopeless as all you see now is white walls,
Lost, not knowing what direction to go, you come to a realisation
Lost in my mind