The beauty of trusting and following Jesus Christ is that your perfection, blessing and eternity is already secure in the arms of God.
First, what is security? The simple answer is that it is the safety from danger of any kind.
To this, we know that a believer is safe from all form of dangers to the blessing, righteousness, holiness and eternity that has given by grace to the believers in Jesus. This isn’t based on your work but in the death and resurrection of Jesus. Jesus is perfect, righteous, holy and eternal.
John 10:28 “I give them eternal life, and they shall never perish; no one will snatch them out of my hand.” Jesus promised us (Christians) that no damage can snatch us from His hand; not the devil, self, and all other forces can take us out from God’s love and perfection.
Jesus promised everyone who trusts in him eternal life (John 3:16). The assurance of eternal life is secure once and for all time because Jesus has paid for it with his blood.
Therefore, don’t believe anyone who scares you with losing the free gift God has given to you.
Fear is the only weapon of the devil, it can only be defeated through faith in Jesus.