Jesus knew what was coming. He knew during Passover's Last Supper who would betray Him, and what would happen during the following day for Him and the man who betrayed Him. He knew the shame coming, the pain, the total desolation, the feeling of abandonment. He also knew what was to come after the cross. He knew about Sunday morning, and endured knowing the joy that was to be His:
Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God. (Hebrews 12:2 KJV)
Which for me, remembering the resurrection, makes Easter the most Holy day in Christiandom. Christmas began the physical life of the man who would spend thirty-three years here, the crucifixion was as He said, the finish, but the resurrection was the proof Jesus' own words:
I am the God of Abraham, and the God of Isaac, and the God of Jacob? God is not the God of the dead, but of the living. (Matthew 22:32 KJV)
The Greek word translated as "gospel" by Strong's is G2098:
εὐαγγέλιονeuaggelion (yoo-ang-ghel'-ee-on)From the same as G2097; a good message, that is, the gospel: - gospel.
G2097 is:
εὐαγγελίζω
euaggelizō (yoo-ang-ghel-id'-zo)
From G2095 and G32; to announce good news (“evangelize”) especially the gospel: - declare, bring (declare, show) glad (good) tidings, preach (the gospel).
I'll leave it up to you to look further into G2095 and G32. However, I caution those who disparage evangelism or evangelists. Jesus was one sharing the good news, just as the angels at His birth and at the empty tomb following the resurrection. Basically, it's what I do here, too - sharing the news that Jesus is Christ, the Messiah for whom Jews awaited through Old Testament prophecies, confirmed when in the Synagogue Jesus said:
And there was delivered unto him the book of the prophet Esaias. And when he had opened the book, he found the place where it was written, The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised, To preach the acceptable year of the Lord. And he closed the book, and he gave it again to the minister, and sat down. And the eyes of all them that were in the synagogue were fastened on him. And he began to say unto them, This day is this scripture fulfilled in your ears. (Luke 4:17-21 KJV)