Take a few moments to reflect on the people you were close to and loved who have crossed over. Being aware of your infinite nature, and staying in infinity's active side, allows you to feel the presence of these souls, who can't die and do not die. In John O'Donohue's book of Celtic wisdom called Anam Cara, he offers these words which I not only concur, but I know to be true from my own personal experience:
"I believe that our friends among the dead really mind us and look out for us... we might be able to link up in a very creative way with our friends in the invisible world. We do not need to grieve for the dead. Why should we grieve for them? They are now in a place where there is no more shadow, darkness, loneliness, isolation or pain. They are home. They are with God from whom they came."
You can not only communicate with and feel the presence of those who've crossed over, you yourself can die while you're alive and rid yourself now of these shadows and darkness, by living in the active side of infinity.
~Dr. Wayne W. Dyer in "The Power of Intention"