Who bears testimony is ‘most important’.
The testimony of a certain person can probably outweigh the testimony of everyone living on earth today due to being a heavenly dignitary as it’s the case in this instance:
Angel Gabriel himself declared this Most Majestic Declaration regarding Lord Jesus Christ:
“And behold, you will conceive in your womb and bear a Son, and you shall name Him Jesus.
“He will be great and will be called the Son of the Most High; and the Lord God will give Him the throne of His father David;
and He will reign over the house of Jacob to the ages, and His kingdom will have no end.” (Luke 1:31 – 33)
‘Son of the Most High (God)’