TSK · Revelation 1:2

Most certainly I tell you, we speak that which we know, and testify of that which we have seen, and you don't receive our witness.

He who has seen has testified, and his testimony is true. He knows that he tells the truth, that you may believe.

for we can't help telling the things which we saw and heard."

But arise, and stand on your feet, for I have appeared to you for this purpose: to appoint you a servant and a witness both of the things which you have seen, and of the things which I will reveal to you;

When I came to you, brothers, I didn't come with excellence of speech or of wisdom, proclaiming to you the testimony of God.

We have seen and testify that the Father has sent the Son as the Savior of the world.

Demetrius has the testimony of all, and of the truth itself; yes, we also testify, and you know that our testimony is true.

Write therefore the things which you have seen, and the things which are, and the things which will happen hereafter;

They overcame him because of the Lamb's blood, and because of the word of their testimony. They didn't love their life, even to death.