Yes, I believe the Bible is true! What I don't believe is your interpretation of it, which wantonly ignores what Christ told the disciples!
"But whenever they persecute you in one city, flee to the next; for truly I say to you [His disciples; the men He was addressing standing right there in front of Him], you will not finish going through the cities of Israel until the Son of Man comes. Matthew 10:23 (NASB)
"For the Son of Man is going to come in the glory of His Father with His angels, and WILL THEN REPAY EVERY MAN ACCORDING TO HIS DEEDS. "Truly I say to you [His disciples; the men He was addressing standing right there in front of Him], there are some of those who are standing here who will not taste death until they see the Son of Man coming in His kingdom." Matthew 16:27-28 (NASB)
You accused me of calling Paul and John liars, and yet what does it speak of your view that ignores and demeans the words of Christ Himself???
Oh, and it wasn't just to His disciples that Jesus said He would see His return. He also said the same thing to Caiaphas and the Sanhedrin at His trial:
But Jesus kept silent. And the high priest said to Him, "I adjure You by the living God, that You tell us whether You are the Christ, the Son of God." Jesus *said to him [the high priest who addressed Him], "You have said it yourself; nevertheless I tell you, hereafter you will see THE SON OF MAN SITTING AT THE RIGHT HAND OF POWER, and COMING ON THE CLOUDS OF HEAVEN." Matthew 26:63-64 (NASB)
His words here are a direct reference to Daniel 7:
"I kept looking in the night visions, And behold, with the clouds of heaven One like a Son of Man was coming, And He came up to the Ancient of Days And was presented before Him. Daniel 7:13 (NASB)
Christ's second coming was not a return to earth but a presentation before the Father when He received the Kingdom that had been under the stewardship of Israel's priesthood under the Law of Moses! The sign of His presence was the destruction of Jerusalem, which forever ended the Old Covenant system of sacrifice!
"And to Him was given dominion, Glory and a kingdom, That all the peoples, nations and men of every language Might serve Him. His dominion is an everlasting dominion Which will not pass away; And His kingdom is one Which will not be destroyed. Daniel 7:14 (NASB)