And this is the record, that God hath given to us eternal life, and this life is in His Son. – 1 John 5:11

The consequences of receiving Christ are good evidences of heavenly life; for when a man receives the Son of God, he obtains a measure of peace and joy; and peace with God and joy in the Holy Ghost are not to be found in the sepulchres of dead souls. When Ezekiel saw the dry bones in the valley, I do not find that any of them were singing for joy of heart, or silently musing in unutterable thankfulness. There was a sort of peace in the valley, the horrible repose of death, the grim silence of the grave; but living, sparkling peace, flowing like a river, those dry bones could not know. Job says of the hypocrite, “Will he delight himself in the Almighty?” Joy in God is too wonderful a work of God for mere professors to forge a passable counterfeit of it. Artificial flowers may be very like the real beauties of the garden, but they lack the joyous perfume and honeyed stores of life, and the bees soon find out the difference: the honey juice and the delicate aroma are not to be matched. The like might be said of all the results of faith, which are far too numerous for me to speak of them in detail, such as purging the conscience from dead works, enlightenment by the Spirit, godly fear, the spirit of adoption, brotherly love, separation from the world, the consecration of life, holy gratitude which mounts like flame to heaven, and sacred affection which ascends like altar-smoke-none of these can be found in the charnel-house of fallen humanity; they can only be discovered in the house of life, where God worketh according to His good pleasure. He that hath the Son, it is clear, has life, because the act by which he lays hold upon the Son of God, the concomitants of that act, and the consequences of that act, all infallibly betoken the possession of life eternal. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0755.cfm