Joan Boney ... apostle/prophet
Isaiah 43:10 ... Ye are my witnesses, saith the LORD, and my servant whom I have chosen: that ye may know and believe me, and understand that I am he: before me there was no God formed, neither shall there be after me.
Witness means "evidence".
When you read the 5 booklets which I have just written, you will see example after example of the working of the Holy Spirit in the lives of believers. Each time those examples are given we are "evidence" of the existence of the Holy Spirit and of the working of the Holy Spirit in the believer.