Colossians 1:5-6 - ...because of the hope which is laid up for you in heaven, of which you heard before in the word of the truth of the gospel, which has come to you, as it has also in all the world, and is bringing forth fruit, as it is also among you since the day you heard and knew the grace of God in truth...
Have you heard? The world is hearing. It has been hearing for 2,000 years. The same Gospel that Jesus shared about Himself continues to be shared. Somewhere along the way it has been twisted and distorted to mean other things, or disbelieved altogether for the hard truth it brings. Hard truth, but glorious truth. For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God. (1Corinthians 1:18 )
The true message of the Gospel has never changed. Perhaps the hard words of Jesus' message, although filled with hope for those who hear, caused some to soften the message, that they would not have to endure seared consciences.
The definition of Gospel is the glad tidings of salvation through Christ; the proclamation of the grace of God manifest and pledged in Christ. Glad tidings, grace of Jesus. See, it still has everything to do with Him. He did not mince His words. He told it like it is. Acknowledge sin, repent of those sins, trust in Christ to forgive those sins and follow Him that you may not fall back into the old life but have new life in and through Him.
We cannot receive salvation through any other person or any other means. Any other way is a lie. It must be through Him. Without Him we are dead to our sins. He came to bring life. He brings the hope of heaven. He brings the absolute truth. All one needs to do is hear and listen and believe His Word. It's not about man's words but His. Read His Word. All we need to know is revealed within the pages.
This truth of His Word, His Gospel, will continue till He returns. People will try to squelch it but He will not fail. This is a plan of the devil, to water down and dispute. But He will reach out till the last day in hopes that yet more would hear, believe and receive and not perish but have everlasting life. His grace extends to all people, all nations, all religions. He is the only way, truth and life. Do not believe there is any other way.
John 10:10 - The thief does not come except to steal, and to kill, and to destroy. I have come that they may have life, and that they may have it more abundantly.