Witness, believe and obey!

John 2:22 (Amplified Bible): When therefore He had risen from the dead, His disciples remembered that He said this. And so they believed and trusted and relied on the Scripture and the word (message) Jesus had spoken

 We have two witnesses, the Word of God (Scripture) and the Holy Spirit. Once the two of these line up, we can believe and act in trust, that the Lord will do what He has promised!

We can get another witness, that is, the confirmation from other beleivers - but the decision we make is ours, and we take full responsibility for it. And it should be firstly and most importantly based on our trust relationship with the Lord