The Holy Ghost

Having discussed the natures of the Father and the Son, we come to the third and final member of the Godhead, the Holy Ghost. While not as much is known about this member of the Godhead as the other members of the Godhead, we have sufficient knowledge of His nature and how he opperates in our lives.
The Holy Ghost does not have a body of flesh and bone like the Father and the Son do. Joseph Smith was revealed the following of His nature: "the Holy Ghost is a personage of Spirit. Were it not so, the Holy Ghost could not dwell in us." (D&C 130:22) What this means is that if we were to see the Holy Ghost, He would look like a man, but yet not have a physical body (Nephi, a prophet who lived 600 years before Christ saw the Holy Ghost and said something similar; see 1 Nephi 11:11). While the Holy Ghost can only be in one place at a time, His enlightening influence can be felt anywhere. As the third member of the Godhead, He too possess all of the attributes and characteristics of God the Father and Jesus Christ.
The Holy Ghost is known by many names and has many roles in the lives of men. He has been called the Comforter, Spirit of God, Spirit of the Lord, the Spirit, and the Spirit of Truth. Having the same characteristics as God does, He teaches and guides (John 14:26; John 16:13), testifies of Heavenly Father and Jesus Christ (John 15:26; 2 Nephi 31: 18; 3 Nephi 11: 32, 36; 1 Corinthians 12:3), warns us against sin (John 16:8), bears witness of truth (Moroni 10:5; Jacob 4:13), and entices (Mosiah 3:19).
Knowing that the Holy Ghost does all of things, one must sincerely ask one of the great questions which all men everywhere must eventually ask if they desire to know the truthfulness of the Gospel, "How can I recognize the Holy Ghost?" Our apostle friend Paul, in his letter to the ancient saints in Galatia taught them to abandon the things of the world and that "the fruits of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness [and] temperance" (Galatians 5:22-23). These feelings one feels when discussing things of the divine are from the Holy Ghost and are true. President Boyd K. Packer, a current apostle of the Lord Jesus Christ, taught the following about the Holy Ghost and how it can speak to us,

“The voice of the Spirit is described in the scripture as being neither ‘loud’ nor ‘harsh.’ It is ‘not a voice of thunder, neither . . . voice of a great tumultuous noise.’ But rather, ‘a still voice of perfect mildness, as if it had been a whisper,’ and it can ‘pierce even to the very soul’ and ‘cause [the heart] to burn.’ (3 Ne. 11:3; Hel. 5:30; D&C 85:6–7.) Remember, Elijah found the voice of the Lord was not in the wind, nor in the earthquake, nor in the fire, but was a ‘still small voice.’ (1 Kgs. 19:12.) The Spirit does not get our attention by shouting or shaking us with a heavy hand. Rather it whispers. It caresses so gently that if we are preoccupied we may not feel it at all. (No wonder that the Word of Wisdom was revealed to us, for how could the drunkard or the addict feel such a voice?) “Occasionally it will press just firmly enough for us to pay heed. But most of the time, if we do not heed the gentle feeling, the Spirit will withdraw and wait until we come seeking and listening and say in our manner and expression, like Samuel of ancient times, ‘Speak [Lord], for thy servant heareth.’ (1 Sam. 3:10.)” (“The Candle of the Lord,” Ensign, Jan. 1983, 53).

We are commanded to seek the Spirit of the Lord, since with it, we can become closer to our Heavenly Father and be worthy to receive great truths pertaining to the Gospel. Not only can we be enlightened by the Spirit, but we can also continue to receive guidance from the Holy Ghost day to day. I know that the Holy Ghost is the messenger of truth and testifies that Jesus is the Christ and that the Gospel. I know that we should always strive to seek His guiding influence and seek to be worthy of having the Spirit guide us in our lives. I know these things to be true and I bear it by the power of the Holy Ghost, in the name of the Lord Jesus Christ. Amen.