To do and to teach

Acts 1:1-5
For John baptized with water, but in a few days you will be baptized with the Holy Spirit.
Jesus began to do and to teach until the day he was taken up to heaven.  Jesus taught about the kingdom of Heaven.
Gift of God's promise is the Holy Spirit.
All the evidence, from earliest times, points to Paul's dear friend Luke, the doctor. Luke is the only non-Jewish writer in the New Testament. He may have come from Antioch, or Philippi. Although we have few facts about his life, his writings prove him to be a skillful writer ad a generally reliable historian. We know, from the way he changes from 'they' to 'we' in Acts(16:10)
The first part of Luke's work is an account of all that Jesus did and taught during his life on earth. Acts continues the story after his return to God, when his work continues through the apostles, empowered by the Holy Spirit at Pentecost.
Why?
Jesus appeared to them over a period of forty days and spike about the kingdom of God, why here talked about Holy Spirit only, for this is important to all his followers.
Without Holy Spirit I can not understand the meaning of Bible, without Holy Spirit I could not know the power and glory of the Lord and Jesus Christ.
How?
Follow the instruction of Holy Spirit and have sense to the Holy Spirit, be humble and obey the word of God, then I will know what is the way from Holy Spirit. Do and teach is the way of Jesus teaching us so I should do and teach other gentile.