The reason Christian’s witness about Christ is because they have the Holy Spirit’s witness in their heart. When the Holy Spirit’s witness comes in – the testimony of a child of God “tells” other people about the person of Christ and God’s Amazing life-changing Grace.
The Spirit’s witness is the morally clean heart that man receives from God. The clean heart will testify to what Christ did within (in relation to sin). The conscience is clear and free from the guilt of all past sin. Reconciliation allows the Holy Spirit’s witness to unite with the heart of a believer. The heart for Christ believes unto righteousness and with the mouth confession is made unto Salvation.
A witness is made. A witness is experienced. A witness will testify. All Christians are witnesses to Christ. All Christians have a glimpse of the power of Calvary. All Christians have a glimpse of a resurrected Christ. All Christians have a passion to tell others about Christ. What Christ did on the cross and what Christ is doing now in the Throneroom! Scriptures teach all Christians have the witness of God in their heart.
1 John 5:10…He that believeth on the Son of God hath the witness in himself