That was when he was still Catholic. It sounded like he left the Church because he was unhappy with the Catholic approach to sin.
Here is the full quote:
My conversion
One Sunday morning, 8th February 1998, I was listening to a sermon from Luke 10:30-37 about the Good Samaritan. The preacher spoke of Jesus Christ being like the Good Samaritan - coming to help us in our wretched sinful state - while revealing that the Holy Spirit gives new life to lost sinners. He also urged the listeners to repent of sin and trust in Jesus Christ alone for forgiveness. I called upon Jesus Christ to save me, ‘For whosoever shall call upon the name of the Lord shall be saved’ (Rom. 10:13). There and then, I knelt down in my room and prayed, ‘O God, I know that you have sent your Son Jesus Christ into the world to save sinners. Will you save me? I trust in Christ alone and ask that you would come into my life by the power of your Holy Spirit and make me new.’ I felt a huge weight of guilt and sin taken from my heart. As soon as I opened my eyes a deep sense of peace came over me. At that moment I knew that I was a Christian and truly forgiven of all my sins. The Bible became the living Word of God and he was speaking to me as I read. I realised that we are not saved by works but by grace, ‘For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast’ (Eph. 2:8,9). I was baptised in London as a believer in September 1998. After my baptism I struggled with temptations and trials, but the Lord was my constant refuge: ‘God is our refuge and strength, a very present help in trouble’(Psa. 46:1).