Answer:
The more you look at it, The less you see.
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
What goes up and down but never moves?
What is something yet nothing, but if you fill it up it will disappear?
This heavy and ancient suit was not worn with a tie, but was always worn in battle.
How did the farmer find his wife?