'Certain' in the Bible

What will come on us, if we do not give our minds to such a great salvation? a salvation of which our fathers first had knowledge through the words of the Lord, and which was made certain to us by those to whom his words came;

But a certain writer has given his witness, saying, What is man, that you keep him in mind? what is the son of man, that you take him into account?

But Christ as a son, over his house; whose house are we, if we keep our hearts fixed in the glad and certain hope till the end.

After a long time, again naming a certain day, he says in David, Today (as he had said before), Today if you will let his voice come to your ears, be not hard of heart,

But, my loved ones, though we say this, we are certain that you have better things in you, things which go with salvation;

And it is our desire that you may all keep the same high purpose in certain hope to the end:

Saying, Be certain that I will give you my blessing, and make your numbers very great.

So that when it was God's desire to make it specially clear to those who by his word were to have the heritage, that his purpose was fixed, he made it more certain with an oath;

And this hope is like a strong band for our souls, fixed and certain, and going in to that which is inside the veil;

Let us go in with true hearts, in certain faith, having our hearts made free from the sense of sin and our bodies washed with clean water:

Make prayers for us, for we are certain that our hearts are free from the sense of sin, desiring the right way of life in all things.