Sending subliminal message:
When one attaches his mind to the mind of another, it is possible to cause the other person to think of him. This particularly applies in regards to matters that are beloved upon the other person. For example, if a person is involved in a joyful activity, then upon one also doing that joyful activity with intent to connect with the person it is possible that this will then cause that person to think of him.
 Or Torah [Maggid] Parshas Vayechi 59