A witness is one who testifies to the certainty of an event. As such, the apostles gave witness to the resurrection of the Lord Jesus Christ. By doing so, they were declaring the resurrection to be an absolute truth. The disciples physically witnessed the fact that the Lord Jesus Christ had been put to death, but was alive and well. Although no believer today physically saw the birth, life, death, burial, or resurrection of the Lord Jesus Christ, we can and should still testify to its truthfulness. In order to offer an adequate witness of the Lord’s saving grace, an individual must first have experienced the new birth combined with the witness of God’s indwelling Spirit (1 John 5:10).
The Bible associates love with action. In this passage, the Bible speaks of the believer’s love for other believers, relating it to the Lord’s crucifixion. If a Christian knows and recognizes the love of God, it should drastically affect his relationships. He cannot deal with others as the world would because the love of God has formed compassion within in his heart. This matter is so important to the Lord that He provided believers with a scenario to help judge their level of compassion. The book of First John says that if a brother has a need, and another brother can help him with his need, yet refuses, he lacks compassion (see also James 2:15-16). Therefore, one’s deeds, not simply one’s words alone, demonstrate true love!
