The Holy Spirit is the third Person of the Trinity, and is involved in all the works of God, from Creation to REDEMPTION and ETERNAL JUDGEMENT. In relation to the unbelieving world, He restrains the Evil One until God’s purpose is fulfilled; He convicts the world of sin, judgment and righteousness; He is the miracle worker of the new birth and indwells, guides and empowers the Believer for love and ministry.
The Holy Spirit is the Spirit of Truth and The Comforter
And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;
Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you. John 14:16-17.
The Holy Spirit is The Teacher of all things and a reminder of what Jesus said.
But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you. John 14:26
The True Holy Spirit will testify of Jesus
But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me: And ye also shall bear witness, because ye have been with me from the beginning. John 15:26-27
The Holy Spirit Himself witnesses our spirit, comforting us with the greatest revelation - WE ARE THE CHILDREN OF GOD
The Spirit itself beareth witness with our spirit, that we are the children of God: Roman 8:16
The Holy Spirit IS a guarantee of our full Salvation
In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise, Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.
Ephesians 1:13-14
The Holy Spirit IS our Intercessor and the Spirit of Intercession through us
Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered. And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God. Roman 8:26-27
Being Led
The Second Lesson, in Christ, after learning our identity in Christ is knowing how to be led by the Holy Spirit. In fact; its paramount to living a good life. It's the difference between success and failure; getting the right deals and being in the right relationships.
The Know It All
We can never know everything in this life. We are not "know-it-alls" but we have a Know-it-all on the inside of us. He was there in Eternity before this universe began. He was the Power of God that created the first sun. The first galaxy and the first human.
The Know It All Inside You
When you received Jesus into your heart as Lord and Savior the Person of the Holy Spirit is the One that entered your dead spirit and recreated or re-birthed your spirit or the real you into a living spirit. He is inside you forever. The more you get to know the real Holy Spirit through the established Word of God you will know Him - His leadings and characteristics, which, will NEVER violate the character of the Father nor His Word.
Keep You From Harm And Error
The Holy Spirit will lead you to the right job, the right career, the right church, the right spouse and the right house. He is the Gifts of the Holy Spirit - He is the Healer, the comforter and the standby that will never leave you nor forsake you. He is all love and all truth. He gives what the Father gave to and through Jesus and He is the One that will remind you and impart understanding, so, you will not make the wrong deals, create wrong associates and make mistakes that can cost precious time and even hurt feelings. He will lead you in peace and health, wealth and wisdom beyond your years and experience. He can make you smarter than your elders and more prosperous than you ever could be in the natural world.
Personal Healing
The Holy Spirit is the friend that sticks closer than a brother. He is the Wonderful Counselor. His characteristics are love, joy, peace, long-suffering, kindness, goodness, faithfulness, gentleness, self-control - Galatians 5:22. And He will rub off on anyone that spends copious amounts of time with Him.
In fact one can always tell when someone fails to feed their relationship with the Holy Spirit because they will lack the characteristics in their behavior.
Every attribute of the Holy Spirit is a healing attribute that facilitates healing in one's mind and emotions and this affects the body and even life skills with others (personally and professionally). No matter what comes the way of the Holy Spirit dominated believer there is just a stalwart dynamic in them - They just overcome. People who knew them before they had the revelation of Jesus testify to this transformation - even while they may disbelieve it's sincerity.
While the smoke clears, those who know and are led by the Holy Spirit come out better than they were before - solid, stronger and smarter and in better condition. One may say: "It's just not fair!"
Oh, it's quite fair to the One that went to hell for us - because everyone has this grace given to them - to receive Jesus and to enjoy the fellowship of the Spirit.