'Itself' in the Bible

What is going to happen to us? Our brothers have drained away our courage by describing people who are more numerous and taller than we are, and great cities whose defenses appear to be as high as heaven itself! Moreover, they said they saw Anakites there."

Out of heaven itself his voice came to you, teaching you; and on earth he let you see his great fire; and his words came to your ears out of the heart of the fire.

so that your days and those of your descendants may be extended in the land which the Lord promised to give to your ancestors, like the days of heaven itself.

However, by no means eat the blood, for the blood is life itself -- you must not eat the life with the meat!

Ye shall not eat of any thing that dieth of itself: thou shalt give it unto the stranger that is in thy gates, that he may eat it; or thou mayest sell it unto an alien: for thou art an holy people unto the LORD thy God. Thou shalt not seethe a kid in his mother's milk.

If by chance you see a place which a bird has made for itself in a tree or on the earth, with young ones or eggs, and the mother bird seated on the young ones or on the eggs, do not take the mother bird with the young:

One must not take either lower or upper millstones as security on a loan, for that is like taking a life itself as security.