Behind glass and under water

When the only sense is sight
That sense cannot be trusted
For tricks of the treacherous light
Are played on an innocent eye

But when sight is partnered and vouched for
By her four respectable sisters
Then she can, perhaps, be trusted
Her findings tasted and touched and tested

And memories are nothing but pictures
And figments and fragmented fictions
And the past becomes distorted
Behind glass and under water