knowing what...：what引导的从句作knowing的宾语，knowing为主语的补语。此句又引出下文，具有承上启下的作用。
"All right,St.John." I said softly,feeling that my heart was breaking. "If God gives me a sign that He really wants me to marry you,I will agree!" "God has answered my prayers!"said St.John. We stood toghether in the house,waiting for a sign from God. It was completely quiet in the house,and I could almost hear my heart beating. I was almost excited. Suddenly I heard a distant voice cry "Jane!Jane!Jane!"and nothing more! Where did it come from? It was Edward Rochester's voice,and it was full of pain and sadness! For a minute the whole world stood still. Then I jumped to my feet. "Edward!I'm coming to you!"I cried. "Wait for me!" I ran into the garden crying out, "Where are you?" But there was no answer. I broke away from St.John,who was following me. He asked me many questions,but I only said, "I have received my sign from God,St.John,"I said. "I will never go to India with you." I told him to leave me,and he obeyed. In my room,I thanked God for the sign he had sent me. Then I fell asleep,knowing what I had to do next.