The life appeared;
we have seen it and testify to it,
and we proclaim to you the eternal life,
which was with the Father and has appeared to us.
The life appeared.
In a dead world, life appeared. That life was the embodiment of God, the incarnation that we know as Jesus Christ.
So, John wants to proclaim that life. He has seen it and testifies to it, and now he wants to declare, "LIFE!" The life that was with the Father and has come to us is something worth knowing about.
I wonder sometimes how much I have strayed from that thought. The world treats Jesus like just another religious icon, and a dead one at that. But if I have seen the work of Christ in my own heart and life, how can I not want to proclaim it in this dead world?