Like a plant, You sometimes need to prune the dead parts of you in order to let the new parts grow. Hanging on to dead things won't awaken them.,they'll keep rotting and cause harm to the whole lot of you.
Prune definition:trim (a tree, shrub, or bush) by cutting away dead or overgrown branches or stems, especially to encourage growth.
Holding on to a dead part of our lives is usually due to attachment as well as lack of faith in the new that will spring out after the old is gone. Prune the dead relationships,interractions and the past that only brings you down. Trust your instincts,prune whats dead to your life and begin life afresh.