I have Jesus in my life. I have life.
This is the essence of the “big thing”.
God wants me to live forever with him. To make that happen God sent his son Jesus to live, die and be raised to eternal life for me.
I have life!
This is the testimony in essence: God gave us eternal life; the life is in his Son. So, whoever has Jesus, has life; whoever rejects the Son, rejects life.