Its as simple as this:
A friend of mine was putting her 7 year old daughter to bed. They had been reading books, singing songs, talking about their day, saying their prayers, etc. Just when my friend thought her little girl had dozed off, she rolled her little self over, and as confident as this 7yr could be, she informed her mom that her illness was gone. My friend had been sick with a curable, yet difficult chronic disease that she had been suffering from for almost a 2 years now. The little girl's mom was shocked and speechless to the unrelated comment from her daughter.
Mom: "Where did that come from?"
Daughter: "God just told me."
Mom: "How do you know God told you that?"
Daughter: "Well mom, when you hear God talking to you, it kinda sounds like your voice but its not you. That's how you know is God telling you things, and I just heard Him tell me that."
Its that simple!