This means they would tell the whole world.
Jesus said Jerusalem, all Jude'a, Samaria, and to the most distant part of the earth. This means witness about him and his Father would extend worldwide.
"And when the disciples saw him walking on the sea, they were troubled, saying, It is a spirit; and they cried out for fear."-Matthew 14:26 They were scarde he was a ghost coming towards them.
Yes, we believe we are the only true disciples of Jesus. Our Kingdom Ministry publication of June 2003 states ''Jesus' disciples alone saw him depart, even as only Jehovah's Witnesses recognize his invisible return and presence, which began in 1914.''
There are many things, mostly spiritual, that Jesus promised his disciples, but I suppose the greatest thing was the baptisim of the Holy Ghost, (Acts 1.4,5)
He assured them that he would send a helper to them, after he has gone, the helper is the holy ghost.
Jesus' disciples
Matthew and John were written by eyewitnesses, Luke and Mark were written secondhand from disciples of Jesus.
They all faithly remained Jesus disciples after his death.
Jesus did not set up any organisation. He simply called the 12 to be his followers and to make them "fishers of men". They were "witnesses of his resurrection" (Acts 4.33)
The acts of the disciples are discussed in the New Testament book of Acts. This book, also known as the Acts of the Apostles, narrates the early history of the Christian Church, focusing on the ministry of the apostles, particularly Peter and Paul, after Jesus' ascension. It describes the spread of Christianity, the actions of the disciples, and the work of the Holy Spirit in the early Christian community.
When Jesus was on this earth, with his twelve disciples , Jesus was filled with the holy spirit, but once he was crucified and had ascended into heaven, he was no longer with them in person. But he had promised to sed the holy ghost as a comforter to them, asnd they were filledwith it on the day of Pentecost.
Jesus' twelve disciples, his earthly parents, and all the people he preached to, besides a few lucky modern people he literally speaks to.
In the book of Acts Jesus promises to his disciples the Holy Spirit, which will empower them to be witnesses starting from Jerusalem to the whole world. The empowering spirit comes on the day of Pentecost as stated in Acts 2:1-4.