In some Churches today we celebrate the conversion of St Paul. Paul was zealously persecuting Christians when the Risen Jesus appeared to him and called Paul to stop persecuting Christians and join them. The experience was so overwhelming that Paul fell to the ground and lost his vision. See Acts 22:3-16 for the whole story.
Sometimes in our lives there is an insight so strong that we feel overwhelmed by it. Maybe a sudden realisation that after many years of following Jesus, I am still a baby in my faith. Maybe a call to change my way of life, maybe an unwelcome call… Maybe simply circumstances that are hard and unrewarding. Any of these things can knock us to the ground. But within there is a personal call to follow Jesus. A call that can change our lives over and over again.