Answer:
Though desert men once called me God today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
What gets whiter the dirtier it gets?
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
I am a king who's good at measuring stuff.
The warmer I am the fresher I am.