When did Jesus secure the atonement for us? Was it not on the cross? Does not secured mean obtained, accomplished, a finished work? Who did he secure that atonement for? Was it not for all that his Father gave (not will give) him? John 6:39.
Bith gave and will give.. reading the verse in context::
(John 6:39-40) "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."
Those that God had given on that day where the saints who had already lived and died..
Did Jesus not say all that the Father gave him will live in heaven, without the lose of even one?
No.. It does not say that they will live in heaven forever..
If Jesus died for all mankind (which he did not) would not all mankind be saved to heaven?
The Atonement of Jesus could have covered every human being that existed.. But the Atonement only covers those who believe Jesus and trust in the Atonement He secured for their justification..
How do people become sons of God?
By believing God and trusting in the Atonement Jesus secured for their salvation..
Does a child choose to be born of his parents?
No..
Can the natural man choose to be a spiritual man when he cannot discern spiritual things? 1 Cor 2:14.
No.. But a man can resist the leading of the Holy Spirit..
All scriptures are the inspired word of God. I do not claim to understand all scriptures. I do understand that all scriptures must harmonize to be the doctrine that Jesus taught.
I do too..