Exploits of the Aged - Joshua 14:6-12
A Window of Time to Serve - Acts 13:36
This life offers only a window of time to work for the Lord. Youth and old age both offer their own hindrances to service. In many ways, though not entirely, youth should be spent in learning, middle age in doing, and old age in teaching. Many of the greatest servants of the Lord found in scripture began their journey in youth by learning of the Lord and His ways (1 Kings 18:12; Psalm 71:5; 2 Chronicles 34:3; Job 29:4; Ecclesiastes 12:1). As they approached the prime of life, they put their learning to use by serving the Lord (Numbers 8:24-25). As they passed their prime, they would pass their knowledge on to the next generation in hopes the work of God would go on (2 Timothy 4:1-8).
Praying for an Open Door - Colossians 4:2-3
Windows of opportunities exist in the lives of the unsaved when they are most receptive to the gospel of Christ. The Devil works hard to keep them in darkness and will distract them by all means necessary (i.e., the death of a loved one, a crying child, a ringing phone, busyness, etc.). The salvation of a soul is a spiritual battle that can only be won by the intervention of the Lord. Not only is there a window of time that the lost are most receptive, but this also suggests a window of opportunity for the saved to speak for Christ. This is the very reason the apostle Paul stressed the importance of the saints of God beseeching the Lord to open a door of utterance (Ephesians 6:19).
A Threefold Witness - Acts 20:20
The message of a gospel witness is a narrow message, but it can be distributed in a variety of ways. The apostle Paul provided three means by which he ministered the word: he shewed them, he taught them publickly, and he ministered the word from house to house. These three categories still exist today. Believers can preach the gospel in church services, in publick settings, and from house to house. Each believer ought to take part in at least one form of witnessing. Even within these areas the gospel can be spread with audible voice or in print. No believer has any excuse not to give the gospel to others. Every believer can witness, even if it is through the distribution of gospel tracts.
Be Ready to Give an Answer - 1 Peter 3:15
If a believer lives a life to the glory of God, there will be a time when the world will want to know "a reason of the hope" that lies within. Simon Peter addressed this in a particular situation of times of persecution. When believers were to "suffer for righteousness' sake" (1 Peter 3:14), the world would want to question their hope. Simon Peter reminded them of the importance of knowing how to answer their persecutors. In like manner, believers ought to know how to answer those that would be curious about the gospel of the Lord Jesus Christ. How shameful is it that many believers would not even know how to explain the need for, and plan of salvation.
To Whom Should We Witness? - Acts 22:15
At first thought, the question of an appropriate audience to receive witness of the resurrection may seem quite simple. However, the issue is somewhat controversial. Some erroneously teach that believers should only witness to Jews, while others teach that believers should witness unto all except for Jews. Others might suggest that believers should not witness to any of the lost. This teaching exists for a number of reasons, none of which are scriptural. The biblical pattern for the New Testament church is that believers should "witness unto all men." All need to hear the gospel, despite their background or their current living conditions. The whole world needs to hear that Christ has risen!
To What Should We Give Witness? -Acts 4:33
In order to be saved, a person must put his faith in the death, burial, and resurrection of the Lord Jesus Christ. Paul defined this central body of truth as the gospel of the grace of God (1 Corinthians 15:1-4; Acts 20:24). Though believers may tell the unsaved what the Lord has done in their lives since being saved, the most important truth to convey when witnessing is that the Lord Jesus Christ was crucified and rose again from the dead. The resurrection became the theme of the early church. A careful study of the evangelistic messages of the early church will confirm this truth. Just as this was the central truth when dealing with the lost then, it should continue to be so today.
The Watchman and Prayer - 1 Peter 4:7
Multiple passages indicate a connection be-tween being a watchman and praying for others. While preaching sounds the trumpet of alarm in the ears of men, prayer sounds the alarm in the ears of God. As a watchman, each believer has a responsibility to his brother or sister in Christ. While some believers are sleeping, spiritually unaware of their present danger, other believers ought to be standing upon the tower of watchfulness and calling upon the Lord. This was the point of Paul's teaching in Ephesians 6:18 when he said, "Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints."
The Purpose of Power - Acts 1:8
Many Bible teachers have become consumed with the powers demonstrated by the apostles. These teachers instruct believers to seek the same power that was bestowed upon Peter and Paul. A careful study of the scriptures demonstrates that the motive in this teaching is misplaced. The power given to the apostles was given for the purpose of assisting them in telling a lost and dying world about a risen Saviour. Much of the modern teaching is centered on pride and encourages a selfish Christianity, but the biblical power given to the apostles was meant to strengthen their witness to others. Modern Christianity focuses on self, while biblical Christianity focuses on the Saviour and others.
Who Is a Witness? - Acts 2:32
A witness is one who can testify 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 truth. The disciples physically witnessed the fact that the Lord Jesus Christ had been put to death, but was alive and well. Though no believer alive today physically saw the birth, life, death, burial, or resurrection of the Lord Jesus Christ, that does not prohibit them from testifying to its truthfulness. In order to accurately give witness of the Lord Jesus, an individual must first have experienced the effects of the new birth and have the witness of God indwelling him (1 John 5:10).