As for Good Friday, the death of Jesus was a very sad thing - for someone to endure so much pain and agony is never good...but we know that good came of it. (Hence the name Good Friday!) Jesus was crucified on a cross so we could have eternal life. Romans 5:8 says, “But God demonstrates his own love for us in this: While we were still sinners, Christ died for us.” God allowed his son to die for all of us, so we could be saved.
"...he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed." ~ Isaiah 53:5
Take a moment today to thank the Lord for everything he's done for you - your health, your family and especially your salvation. If you're not a Christian, I encourage you to read more about becoming one.