(adjective) of, relating to, or constituting a portent / (adjective) eliciting amazement or wonder; prodigious / (adjective) being a grave or serious matter / (adjective) self-consciously solemn or important; pompous / (adjective) ponderously excessive
this portentous philosophical phrase or statement is not outside the work but inside it
on Damien Hirst's 'The Physical Impossibility of Death in the Mind of Someone Living'