“And you also were included in Christ when you heard the message of truth, the gospel of your salvation. When you believed, you were marked in him with a seal, the promised Holy Spirit, who is a deposit guaranteeing our inheritance until the redemption of those who are God’s possession—to the praise of his glory. I keep asking that the God of our Lord Jesus Christ, the glorious Father, may give you the Spirit of wisdom and revelation, so that you may know him better. I pray that the eyes of your heart may be enlightened in order that you may know the hope to which he has called you, the riches of his glorious inheritance in his holy people, and his incomparably great power for us who believe.”
Ephesians 1:13-18 NIV
Far be it from God to give you something as beautiful as salvation and leave you guessing whether you received it. He gives to us in that moment assurance too, a deposit guaranteeing our inheritance.
Paul says that you are marked and sealed by the Holy Spirit.
Through the Holy Spirit, we have security. At those moments we feel unsure, we can rest on him. His presence is comfort, and it is not without effect.
You have the eyes of your heart opened, you are filled with His Hope and you have significance. He leads you into deeper revelations of Jesus and the power at work within you.