Answer
The word kairos was an ancient Greek word meaning āopportunity,ā āseason,ā or āfitting time.ā Another Greek word for ātimeā was chronos. A sequence of moments was expressed as chronos, emphasizing the duration of the time; an appointed time was expressed as kairos, with no regard for the length of the time. Thus, chronos was more linear and quantitative, and kairos was more nonlinear and qualitative.
The Bible uses the word kairos and its cognates 86 times in the New Testament (e.g., in Matthew 8:29; Luke 19:44; and Acts 24:25). The word often includes the idea of an opportunity or a suitable time for an action to take place. When we āseize the day,ā we are taking advantage of the kairos given to us. Kairos is related to the Greek word kara (āheadā). A kairos is a time when things ācome to a head,ā requiring decisive action.
In Jesusā parable of the wheat and the tares, the Lord refers to the coming judgment as a harvest: āAt that time [kairos] I will tell the harvesters: First collect the weeds and tie them in bundles to be burned; then gather the wheat and bring it into my barnā (Matthew 13:30). By using kairos here, Jesus emphasizes the fact that Judgment Day is an appointed time, and at that time will occur certain things appropriate for the day.
There was āan appointed timeā for John the Baptist to be born (Luke 1:20). The Lord promises to reward His servants at āthe proper timeā (Luke 12:42). Jesus predicts that Israel will be judged ābecause you did not recognize the time of Godās coming to youā (Luke 19:44, emphasis added). Each of these uses of kairos denotes a unique time in which something special was to happen.
The Bible warns that we should take full advantage of the opportunities God gives us. Unbelievers have the responsibility to respond to opportunities to believe the gospel. Jesusā first recorded sermon was simple: āThe time [kairos] has come. . . . The kingdom of God has come near. Repent and believe the good news!ā (Mark 1:15). When the people of Galilee were confronted with Jesusā life-changing message, God expected them to believe.
Governor Felix was listening to Paul speak, and āas [Paul] reasoned about righteousness and self-control and the coming judgment, Felix was alarmed and said, āGo away for the present. When I get an opportunity [kairos] I will summon youāā (Acts 24:25, ESV). Felix wanted to pick his own opportunity to respond to the gospel, ignoring the opportunity of the present. In so doing, he did respond—he rejected the gospel.
Paul communicated the urgency of the gospel: āI tell you, now is the time [kairos] of Godās favor, now is the day of salvationā (2 Corinthians 6:2). There is a window of opportunity to accept Godās salvation, and we do not know when that window will close.
The believer must take advantage of opportunities to serve the Lord. āAs we have opportunity [kairos], let us do good to all people, especially to those who belong to the family of believersā (Galatians 6:10). We must be āmaking the most of every opportunity [kairos], because the days are evilā (Ephesians 5:16). And ālet us not become weary in doing good, for at the proper time [kairos] we will reap a harvest if we do not give upā (Galatians 6:9).