For the Lord loveth judgment, and forsaketh not his saints; they are preserved for ever: but the seed of the wicked shall be cut off. -Ps. 37:28

I have long been a believer in the doctrine of eternal security because I believe that anything less than that attempts to diminish what Christ did for us on the cross. There is tremendous biblical support for the doctrine, a part of which I will now share with the reader:

Ye that love the Lord, hate evil: he preserveth the souls of his saints; he delivereth them out of the hand of the wicked. -Ps. 97:10

My sheep listen to my voice; I know them, and they follow me. I give them eternal life, and they will never perish. No one can snatch them away from me, for my Father has given them to me, and he is more powerful than anyone else. No one can snatch them from the Father’s hand. -John 10:27-29 (NLT)

That is why I am suffering here in prison. But I am not ashamed of it, for I know the one in whom I trust, and I am sure that he is able to guard what I have entrusted to him until the day of his return. -2 Timothy 1:12 (NLT)

For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord. -Romans 8:38-39