Death

" It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all going direct the other way"
Dickens speaks about life and its different phases in these lines and also identifies the  inevitability of death.Throughout the course of the novel death has been a recurrent theme as he explores death through different avenues like the sea, fire, the mob, the angry peasants, revenge, murder, La force, the guillotine and many other similar agents
The solitary confinement in La force depicted the foreshadowing existence of death; encircling every individual like an invisible halo. 

 Although this space was giving refuge to life, showed death lurking behind like a ghost. The room consisted of the bare minimum ”a chair, a table, and a straw mattress” .It was bare, small  and suffocating ; had space only of “five paces by four and a half”. The room was packed with four walls on each side but the silence of the walls echoed and tormented Darnay. The silence in the room tortured every forebearer in the room and enabled them to imagine, hallucinate, envision all that was there and could be there. Because the only entities in the room were Darnay, the chair, the table , the straw mattress and silence , the existence of significant others such as ghosts and haunting remnants of people’s pasts traumatized Darnay.
 Thus this room served as a constant reminder of life's end that is death and whoever was put into this room would value their remaining time on earth and recall all their life experiences, thereby linking it to Dicken's opening statement about life and death.