But when He, the Spirit of Truth (the Truth-giving Spirit) comes, He will guide you into all the Truth (the whole, full Truth). For He will not speak His own message [on His own authority]; but He will tell whatever He hears [from the Father; He will give the message that has been given to Him], and He will announce and declare to you the things that are to come [that will happen in the future]. —John 16:13
God knew you would need help in understanding His plan for you, so He sent the Holy Spirit to dwell inside you. He is your Guide, your Teacher of truth, your Comfort, and your Helper. He is also the Parakletos (Paraclete), which means counselor, advocate, and intercessor.
Jesus was confined to a body and could be only one place at a time. But He knew the Holy Spirit would be with you everywhere you go, all the time, leading and guiding you. Embrace the Holy Spirit in you, resting in the knowledge that in Him you are becoming everything God planned for you to be.