I guess you can't answer the question, "Are we speaking servants or sons?"
Matthew 18:21-35 Then came Peter to him, and said, Lord, how oft shall my brother sin against me, and I forgive him? till seven times? (22) Jesus saith unto him, I say not unto thee, Until seven times: but, Until seventy times seven. (23) Therefore is the kingdom of heaven likened unto a certain king, which would take account of his servants. (24) And when he had begun to reckon, one was brought unto him, which owed him ten thousand talents. (25) But forasmuch as he had not to pay, his lord commanded him to be sold, and his wife, and children, and all that he had, and payment to be made. (26) The servant therefore fell down, and worshipped him, saying, Lord, have patience with me, and I will pay thee all. (27) Then the lord of that servant was moved with compassion, and loosed him, and forgave him the debt. (28) But the same servant went out, and found one of his fellowservants, which owed him an hundred pence: and he laid hands on him, and took him by the throat, saying, Pay me that thou owest. (29) And his fellowservant fell down at his feet, and besought him, saying, Have patience with me, and I will pay thee all. (30) And he would not: but went and cast him into prison, till he should pay the debt. (31) So when his fellowservants saw what was done, they were very sorry, and came and told unto their lord all that was done. (32) Then his lord, after that he had called him, said unto him, O thou wicked servant, I forgave thee all that debt, because thou desiredst me: (33) Shouldest not thou also have had compassion on thy fellowservant, even as I had pity on thee? (34) And his lord was wroth, and delivered him to the tormentors, till he should pay all that was due unto him. (35) So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.
We are sons through the new birth, and servants as we serve Him out of a thankful heart for His gracious and free salvation.
Here, ponder these (rather than lock into your preconceived NOSAS position...
John 5:24 KJV
[24] Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.
Romans 5:10 KJV
[10] For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life.
Philippians 1:6 KJVS
[6] Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ: