This oil painting talk about personal purgatory with its tragedy because:
It is like the research of psychical process and psychological defensive devices how I understand oneself as personality. My inner protector - "walls" create the inner barrier witch rase the conflict with oneself and the people round about, inner harmony degrade, begin depress/drag down, feels oneself isolation, alienation, inscrutable waiting and despair.
It is like the reflection of perceived and not comprehended empathies.
It is like the map which helps to understand and better orient in human relationships with oneself but deep inside we all want to be safe.