What was the symbolism behind the final note in Jodi Picoult's book The Pact. This is the blank note contained within the Tin Can Message System

In Part III, the truth, Chris finds a note that either he or Emily had tried to send to the other. It is blank and that seems appropriate, symbolic of all that has taken place this past year. Life is a blank slate for Chris now, and he has to do the best he can, going on with his life without Emily in it.