“However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come.” John 16:13

The Holy Spirit comes into a believer to guide you into all truth. He does not speak from His own volition or authority but He speaks from what He hears directly from the person of Jesus Christ. He gives you the mind of Christ.
The Spirit will tell you about things to come in your life because He speaks from the omniscient nature of God. The Spirit will always glorify Jesus. He does this by taking what belongs to Jesus and sharing it with you.
All things that belong to God also belong to Jesus. You do not have to go searching for the wisdom and truths of God. The source of all knowledge from God lives in you in the essence of the Holy Spirit.
Jesus wants to share Himself with you and show you how to live in oneness with Him through all the details of your life. You can actually appropriate the life of Jesus into all the nuances of your life today.
The Holy Spirit wants to be involved in your thoughts, words and decision making. He is a conduit to the abundant life of Jesus. The secret is to invite Him to have authority over you life and His Spirit will flourish within you.
The Holy Spirit is very sensitive to sin so when you allow self to override the will of God you diminish the power of the Holy Spirit. This powerful source of God dwelling within you becomes limited until you repent and submit yourself under the authority of the Spirit.
Your body is a temple of the Living God filled with the precious nature of the Holy Spirit. Submit to the Holy Spirit and He will lead you into the greatness and glory of God!