What Am I Riddles

Question: I am the beginning of sorrow, and the end of sickness. You can't express happiness without me, yet I'm in the midst of crosses. You may find me in the sun, but never in the evening. What am I?

Question: I fall while I'm flying, but can't touch the ground. I'm beaten all day, yet don't make a sound. I try to leave when you keep hitting me, but you always manage to somehow get me. No matter what I do, I always find my way back to you. What could I possibly be?

Question: What goes back and forth constantly, but never in a straight line?

Question: What has a lot to say but can't be heard because it can't speak one single word?

Question: I had a chance to be alive, but I am dead. I am white but some times brown. And most times when I open I feel like I'm burning as I face the sun.