Your eternal life with God is already paid for by the blood of Jesus, and the Devil cannot take away the sacrifice that Jesus made for you.
Satan knows that God gave His Son to be, crucified so that we can be redeemed, forgiven from sins and share eternal life with God. It is something the Devil wish to prevent at all cost. Therefore, he decided that there must be some ways in which he can tempt you into betraying God so that you can be with the Creator in eternity.
The Devil knows that God will not grow tired of you. He gives strength to the weary and increases the power of the weak. Has Isaiah 40:28 – Hast thou not known? Hast thou did not hear, that the everlasting God, the Lord, the Creator of the ends of the earth, fainteth, neither is weary? There is no searching of his understanding.
Deuteronomy 33:27 – The eternal God is thy refuge, and underneath is the everlasting arms: and he shall thrust out the enemy from before thee; and shall say, Destroy them.
Your eternal life with God assures when you follow his teaching, obey the commandments, drive Satan and his demons out of your life. Do not accept the Devil tools of greed, lust, envy, vanity, sloth, evil and gluttony. Love each other as God loves you. Show kindness, humility, empathy and trust to your fellow humans.
Hebrews 9:15 – And for this cause, he is the mediator of the new testament. That through death, for the redemption of the transgressions that were under the first testament. They which are, called might receive the promise of eternal inheritance.
You are, told in the book of Hebrews 9:15 that you should not fear death as this is the passage that the redeemed will be with God for eternity. Do not let the evil ways of the Devil robbed you this crown.