Author's Riddles

Question: I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am i?

Question: What is harder to catch the faster you run?

Question: You will always find me in the past. I can be created in the present, But the future can never taint me. What am I?

Question: I am lonely and yet you use me a lot. What am I?