Knock – Dreaming about knocking on a door is a symbol of new things entering into your life. It is important understand that nothing can enter into your life without your express invitation. This is not to say that things cannot cross your path of affect you without your invitation, but merely that they can have no lasting effect nor can they remain in your life unless you allow them to. The knocking that you hear in a dream represents something that desires to become a part of your life. You can allow it to enter into your life or refrain from inviting it in.