Answer:
I have it, I don’t share it. If I share it, I don’t have it. What is it?
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
Voiceless it cries,Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters.
A dagger thrust at my own heart, dictates the way I'm swayed. Left I stand, and right I yield, to the twisting of the blade.
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
I am free the first time and second time but the third time is going to cost you money.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?