'Sure' in the Bible

But we are sure that the judgment of God is according to truth against them which commit such things.

to those who by persistence in doing good seek [unseen but certain heavenly] glory, honor, and immortality, [He will give the gift of] eternal life.

For on the ground of obedience to Law no man living will be declared righteous before Him. Law simply brings a sure knowledge of sin.

Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,

so that the promise should be made sure to all Abraham's true descendants; not merely to those who are righteous through the Law, but to those who are righteous through a faith like that of Abraham. Thus in the sight of God in whom he believed, who gives life to the dead and makes reference to things that do not exist, as though they did, Abraham is the forefather of all of us. As it is written, "I have appointed you to be the forefather of many nations."

Sin was [committed] in the world before the Law [was given], but sin is not charged [against anyone] when there is no law [against it].

For I am convinced [and continue to be convinced—beyond any doubt] that neither death, nor life, nor angels, nor principalities, nor things present and threatening, nor things to come, nor powers,

My meaning is that Christ has become a servant to the people of Israel in vindication of God's truthfulness-- in showing how sure are the promises made to our forefathers--

So after discharging this duty, and making sure that these kind gifts reach those for whom they are intended, I shall start for Spain, passing through Rome on my way there;

And I am sure that, when I come unto you, I shall come in the fulness of the blessing of the gospel of Christ.