1 Thessalonians 1:5 For our gospel did not come to you in word only, but also in power, and in the Holy Spirit and in much assurance
The good news! Its not a thought. Its not an expression. Its about a person, Jesus Christ, whom came and took our sin and punishment of death in our place. The testimony of what Jesus has done but the fulfillment of the Word of God by Jesus, that is the word that Paul brought. Nothing new! Nothing made up! No hype session. Just Facts and the evidence of changed lives, how does this happen? Simple, only the power of the Holy Spirit in the life of the believer. Who can change their lives nor want to, apart from God? The Spirit filled life is one of boldness and power. He assures us and convicts us.