For those who have yet to receive the goft of the Holy Spirit, differentiating the voices of God and the devil may be difficult. For seekers, the Bible is very important. Often times you can tell the source of the voice by the message. If the voice tells you to do something or believe something, confirm it with Scripture. If the voice contradicts the Scripture, it is not God; ignore the deceiver's voice. Refer to the Scripture and study it as much as possible. God Bless.