'It's' in the Bible

It's the Spirit who gives life; the flesh accomplishes nothing. The words that I've spoken to you are spirit and life.

Why don't you understand what I've said? It's because you can't listen to my words.

Some were saying, "It's him," while others were saying, "No, but it's someone like him." But he himself kept saying, "It's me!"

It's to him the gatekeeper opens the gate, and it's his voice the sheep hear. He calls his own sheep by name and leads them out.

But when Jesus heard it, he said, "This illness isn't meant to end in death. It's for God's glory, so that the Son of God may be glorified through it."

However, I'm telling you the truth. It's for your advantage that I'm going away, because if I don't go away, the Helper won't come to you. But if I go, I will send him to you.

That disciple whom Jesus kept loving told Peter, "It's the Lord!" When Simon Peter heard that it was the Lord, he put his clothes back on, because he was practically naked, and jumped into the sea.

Jesus told him, "If it's my will for him to remain until I come back, how does that concern you? You must keep following me!"

So the rumor spread among the brothers that this disciple wasn't going to die. Yet Jesus didn't say to Peter that he wasn't going to die, but, "If it's my will for him to remain until I come back, how does that concern you?"