The gospel is “good news.” God (one being) has eternally existed in three persons: Father, Son, and Holy Spirit. For his own glory, he created all things “very good” (Gen 1:31). But mankind fell into sin through the disobedience of our first parents, Adam and Eve (Gen 3:1-24). Because of this fall we are under the punishment of God (Eph 2:1-3), and there are all kinds of difficulty in the created world: sickness, theft, murder, natural disasters, lust, greed, envy, pride, and false worship, and others. Creation isn’t the problem, but mankind in our sin abuses God’s good gifts like food, sex, technology, art, and more (Jas 1:14-15; Mark 7:14-23). Instead of being at peace with God, there is war with God (Col 1:21; Rom 5:10). What is wrong with the world is not lack of education, or lack of self-actualization, or lack of resources, but sin.
Now, by our nature we worship and serve created things like food, sex, technology, and art, with ourselves as our chief idol (Rom 1:25). We sin by seeking happiness and satisfaction in other places besides God himself (Jer 2:13). God is holy and righteous and good, and is so loving that he will not let evil go unpunished (Ps 7:11). But in his great love and grace, God came down in human flesh in the person of Jesus Christ. Jesus lived perfectly (Heb 4:15; 1 John 3:5). He always did what was pleasing to the Father (John 8:29). He willingly went to the cross to take the punishment that sinners deserve for our crimes against God (1 John 4:10). Through Jesus’ perfect life, death on the cross in the place of his people, and resurrection from the dead, God grants the record of Jesus’ perfect life to his people (2 Cor 5:21). He brings us to God (1 Pet 3:18) to be included in his family (Gal 4:5-6), and to have joyful eternal fellowship with him (John 17:13; Ps 16:11). In the future we will live with him in resurrected bodies on a restored earth (2 Pet 3:13). This gift is available to anyone who turns from trusting in their own good works and puts their trust solely in the one and only Jesus Christ of the Bible for rescue (Luke 18:9-14).
The Holy Spirit changes the hearts of sinners to worship and treasure Christ, and to seek to live for his glory (Ezek 36:26-27) and find their happiness in him (Matt 13:44; Ps 43:3-4). The church applies the implications of this good news of grace to all areas of life (Tit 2:11-12; Col 1:6, 23, 2:6-7; Gal 2:14, 3:1-3; Acts 20:32; 1 Cor 1:18; 2 Pet 1:9). Jesus’ Lordship does not only extend to the church, but also to politics, education, art, entertainment, literature, economics, exercise, food, and literally everything (Eph 1:20-23; Col 1:15-20; Matt 28:18). While his people live for his glory in all areas of life (1 Cor 10:31), he begins to make all things new and put everything back in order (Col 1:19-20). He enables us once again to use his good creation to glorify him by enjoying him, and to advance his Kingdom (Rom 8:19-23). Christ will one day return to judge the world and his enemies (Matt 25:41-46). Everything will finally be put back into order in all of his creation (Col 1:19-20; Eph 1:10; Matt 19:28). He will finish restoring all things to be even better than their original design. Every tear will be wiped away and his church will live with him and enjoy him forever (Rev 21:1-27).