Devotionals

How to Know For Sure You Have Eternal LIfe

by Michael Edwards 
07/23/26
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“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.” (1 John 5:13 NASB)

John wrote this so believers could have certainty. The Greek word for “know” here is oida (οἶδα). It means to know fully, to be sure of, to have absolute knowledge or awareness—not a hopeful guess or temporary feeling, but settled, confident knowledge. This assurance come from walking by faith in what God has promised, not by sight in this temporal world. Don't let the enemy deceive you into doubting God like he did with Adam and Eve.

How is such certainty possible? Only because salvation is entirely about Jesus and nothing about us. If it were Jesus plus our performance, our obedience, or our consistency, we could never know for sure. We still fail. We still struggle with the flesh. Our track record is imperfect. But God never designed salvation that way.

Jesus finished the work. On the cross He declared, “It is finished!” (John 19:30 NASB). He fully paid the debt, satisfied the Father’s justice, and secured eternal life for everyone who believes. “For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life” (John 3:16 NASB). Notice the promise: whoever believes has eternal life—present tense, already possessed.

Other clear verses confirm the same simple truth: “Truly, truly, I say to you, he who hears My word, and believes Him who sent Me, has eternal life, and does not come into judgment, but has passed out of death into life” (John 5:24 NASB). “For by grace you have been saved through faith; and that not of yourselves, it is the gift of God; not as a result of works, so that no one may boast” (Ephesians 2:8-9 NASB). “Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ” (Romans 5:1 NASB).

God is the Promise Maker. The burden rests on Him to keep His word. “God is not a man, that He should lie, nor a son of man, that He should repent; has He said, and will He not do it? Or has He spoken, and will He not make it good?” (Numbers 23:19 NASB). He cannot lie (Titus 1:2 NASB), and He is powerful enough to make His promise a reality for every believer.

If salvation depended on Jesus plus our efforts, assurance would be impossible. We would always wonder if we had done enough. But because it is solely Jesus’ finished work received by faith, we can know. John wrote so we would know—not hope, not wonder, but know.

Have you believed the gospel and placed your faith in Jesus as Savior? Then rest. God has already given you eternal life. The New Covenant is sealed with the blood of Christ. Your failures do not cancel His promise. Trust the Promise Maker. He is for you, He loves you, and He keeps His word forever.

Many more New Covenant Bible Studies HERE. Jesus poured out His blood for the New Covenant of grace and truth, replacing the Old Covenant law of Moses. Believers are exclusively under the New Covenant, the last will and testament of Jesus that began after the cross. And in the same way He took the cup after they had eaten, saying, "This cup which is poured out for you is the new covenant in My blood." Luke 22:20