1 Peter 4:7

7 The end of all things is near; therefore, be of sound judgment and sober spirit for the purpose of prayer.

“The end of all things” is referring to this life as we know it—the end being the Rapture of the church, then the seven-year Tribulation, then His Second Coming and His new kingdom. To be of “sound judgment and sober spirit” means that we are to be calm and level headed and not over emotional and fearful. A calm mind indicates that one is trusting in God and able to pray by faith as he waits for His coming.