Mr. Piper was certainly mistaken. I'm sure he didn't conduct an experiment. It is as the Word says. That doesn't make him a liar, it just makes him wrong in this case.
If you see only one street, that doesn't mean there isn't any other. That is your assumption. That is so weak, it is hardly worth mentioning. They say that Heaven is a planet, and it would be ridiculous to assume an entire city only has one street, let alone the rest of Heaven. You think you've debunked the book based on this?
You've already said you were going to Heaven in spite of what happens in your heart or in spite of what you say or do?
Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.
2 John 1:9
Whosoever abideth in him sinneth not: whosoever sinneth hath not seen him, neither known him.
1 John 3:6
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
1 John 2:4
He that saith he is in the light, and hateth his brother, is in darkness even until now.
1 John 2:9
If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth: But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
1 John 1:6-7 (KJV)
If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. If we say that we have not sinned, we make him a liar, and his word is not in us.
1 John 1:8-10 (KJV)
You need to walk in the light. You can't hate anyone. The Word speaks of many things you cannot do.
Not sure how fabricating stories, such as dying and going to heaven for 90 minutes and never seeing Jesus, helps people. If anything, it teaches people that it is OK to make up stories that are not true.
I can't find on instance in the Bible of Christ or His Apostles lying to help people.
Judge not, that ye be not judged. For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
Matt 7:1-2
So you're saying they are deceivers. You may not agree with them, but it is not for you to judge their heart. According to Matthew 7:1-2, that makes you a deceiver for passing judgment on them. Because they don't agree with your take on the Word, or were mistaken in one point, they are now liars? You've called Jesus' brother a liar.
It doesn't matter who you trust. God will not violate His Word for you or anyone.
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
Rev 21:8 (KJV)
The scripture has proven your lack of knowledge of the Word. Does that make you a liar (apart from your judgment)? It is not for me to say. Your judgment (words) will judge you in the last day. Will you not repent?