"When the Advocate comes whom I will send you from the Father, the Spirit of truth who proceeds from the Father, he will testify to me. And you also testify, because you have been with me from the beginning." John 15:26-27
And testify they did. In a few days we will be witnessing what Jesus told them about the Advocate. And in the course of the New Testament we have many accounts of what has been witnessed by those who have been with him since the beginning. What a rich source of testimony to the truth. Can we do this, too. Yes. Have any gone to a Parish Retreat, with a guest speaker. How many have gone away feeling enlightened, and told others of the experience. Or did we keep it to ourselves, afraid of what others might think, because we happened to have felt good listening to God's word and letting the Spirit of Truth in. Those are the times when giving witness is for the greater glory of God.
It's the same with any powerful experience we have that bears retelling. Only difference, we tend to tell stories of our exploits rather than spiritual ones. We receive these in order for us to speak of them just as the apostles have done. It's quite awesome when we think about it, being part of the apostles too, after all they did what Jesus asked and witnessed, and we have this opportunity too. To be just as the apostles have, to give testimony