Why must you endure to the end if your eternal life is guarenteed now and forever?
hebrews 10
35
Cast not away therefore your confidence, which hath great recompence of reward.
36 For ye have need of patience, that,
after ye have done the will of God, ye might receive the promise.
37 For yet a little while, and he that shall come will come, and will not tarry.
38 Now
the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him.
39
But we are not of them who draw back unto perdition;
but of them that believe to the saving of the soul.
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john 6
28 Then said they unto him, What shall we do, that we might work the works of God?
29 Jesus answered and said unto them,
This is the work of God, that ye believe on him whom he hath sent.
37
All that the Father giveth me shall come to me; and him that cometh to me
I will in no wise cast out.
38 For I came down from heaven, not to do mine own will, but the will of him that sent me.
39 And this is the Father's will which hath sent me, that of all which he hath given me
I should lose nothing, but should raise it up again at the last day.
40 And this is the will of him that sent me, that
every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.
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1 John 2:19
19 They went out from us,
but they were not of us; for
if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest
that they were not all of us.