Much of Hamlet is about the precise kind of slippage the mourner experiences: the difference between being and seeming, the uncertainty about how the inner translates into the outer, the sense that one is expected to perform grief palatably. (If you don't seem sad, people worry; but if you are grief-stricken, people flinch away from your pain.)
The Long Goodbye: A Memoir (ed. Penguin, 2011) - ISBN: 9781101486559