“And this is the ensample unto them, that they shall speak as they are moved upon by the Holy Ghost.
And whatsoever they shall speak when moved upon by the Holy Ghost shall be scripture, shall be the will of the Lord, shall be the mind of the Lord, shall be the word of the Lord, shall be the voice of the Lord, and the power of God unto salvation.”
(Doctrine & Covenants 68:3-4)
The Holy Ghost is a spirit. He is the third member of the Godhead. By being a spirit he is able to speak unto our hearts and our minds. He bears record of the truthfulness of all things, and cannot tell a lie.
After baptism into The Church of Jesus Christ of Latter-Day Saints, brethren who hold the Melchizedek priesthood lay their hands upon the head of the person who has been baptized and ask them to receive the gift of the Holy Ghost. The Holy Ghost can then dwell in us, giving us direction in all things, if we remain worthy of it’s presence and council. We can receiver personal revelation through the influence of the Holy Ghost. For me, personally, I hear the Holy Ghost speak clearly to my mind and feel a confirmation of his presence in my heart, as a warm feeling or a feeling of knowing without doubt.
Men who are called as the Prophet of the Lord can receive not only revelation for himself – personal – and also on behalf of The Church. This revelation is given and confirmed by the Holy Ghost.
All of God’s children can feel the influence of the Holy Ghost in their lives, often when they receive answers to prayers.