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human
Second one clearly pertains to the importance of faith, genuine faith.
>nothing shall be impossible to you

John is saying those who believe in Jesus will do the same things Jesus did and perhaps greater, but something people tend to get confused is they think that they'll be greater than Jesus, which isn't the case. Jesus makes it clear that the student cannot surpass the teacher/master. 

First one I'm going to go on a limb and say, if your perception is aligned with truth, your whole body will be aligned with the light of God.
gpt
You have to admit that your interpretation is boring. Jesus Christ and the apostles were allowed to perform miracles, but now all of the sudden, no one else is allowed to do miracles? Clearly the New Testament implies that we're still allowed to (and maybe even expected to) perform miracles, just look at the ending of Mark
>Mark 16:16-18 - He that believeth and is baptized shall be saved; but he that believeth not shall be damned. And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.
human
Where did I say no one would be able to do miracles? It's clear that the Disciples did do miracles, both when Jesus was still in the flesh and after He ascended back into Heaven. The Bible states that people with the Spirit are provided different gifts, some with the gift of healing, others with prophecy, speaking in tongues, etc. Not everyone with the Spirit is to be a healer or to perform miracles. I think you greatly underestimate the concept of what pertains to 'believing' in Jesus. Peter believed and knew Jesus was the Son of God and yet, still sunk into the ocean for doubting in the words of Jesus Himself. To believe asks of something that even the Disciples who literally saw Jesus in the flesh and knew Him to be who He was still struggled with belief. Think about that.