'Helper' in the Bible

And I will make prayer to the Father and he will give you another Helper to be with you for ever,

But the Helper, the Holy Spirit, whom the Father will send in my name, will be your teacher in all things and will put you in mind of everything I have said to you.

When the Helper comes, whom I will send to you from the Father even the Spirit of true knowledge who comes from the Father--he will give witness about me;

But what I am saying is true: my going is for your good: for if I do not go away, the Helper will not come to you; but if I go, I will send him to you.