Good Riddles

Question: I live with first ones ,they use me well! For the others I am hell! For the third ones I am useless,you can't touch me but you can see me! I am always there within you! Seek for me and and I'm right there! What am I?

Question: What is something of which there are multiple, but you can't make full a list of, while you can make a list of the worst ones.

Question: How do you catch a giraffe? Giraffe bait. How do you catch a shark? Shark bait. How do you catch a master?

Question: Gabriel cries for months! What could have caused him to cry so?

Question: What is the fastest thing on earth