'Being Sure' in the Bible

He that is surety for a stranger shall suffer for it: and he that hates being surety is secure.

And that they said to leave the stump of the roots of the tree; thy kingdom being sure to thee, from when thou shalt know that the heavens rule.

Therefore it is on the principle of faith, that it might be according to grace, in order to the promise being sure to all the seed, not to that only which is of the law, but to that also which is of Abraham's faith, who is father of us all,

Now faith is being sure of what we hope for, being convinced of what we do not see.