From Darrell B. Harrison.
In 1 John 5:13 (LSB), the apostle John writes, "These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life."
Please note that John said, "that you may know, that you have eternal life," he did not say, "that you may feel like you have eternal life." The word "know" is the Greek verb "eido," which means to perceive, to have knowledge of, to understand. For context, that same verb is used in an eschatological sense in Matt. 25:13 (LSB), where Jesus says, "Be on the alert then, for you do not know the day nor the hour [of His return]" and, conversely, Jn. 10:4, where Jesus says, "When he puts forth all his own, he goes ahead of them, and the sheep follow him because they know his voice."
The apostle Paul declares in Rom. 10:9 (LSB), ". . . that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved." In Eph. 2:8a (LSB), Paul writes, "For by grace you have been saved through faith . . ." He did not say, "For by grace you have been saved through feelings."
If you have truly believed in Jesus Christ for the forgiveness of your sins - and you know in your heart whether you have or not - your salvation is eternally secure solely on the basis of the nature and character of a holy God who cannot lie (Tit. 1:2), not on the basis of your mutable and unreliable feelings.
Remember that today.
The Christian life is a daily battle to believe God. May God strengthen you this day - and every day - to believe His promises in spite of what your flesh may tell you.
~DBH