1. All manner of sin will be forgiven men, but...
2. Blasphemy against the Spirit is not forgiven in this age or the next
So there is only one kind of sin not forgiven by God.
Now read these passages. Do they not identify the kind of sin that is not forgiven by the Father?
Matthew 6:14 For if ye forgive men their trespasses, your heavenly Father will also forgive you: 15 But if ye forgive not men their trespasses, neither will your Father forgive your trespasses.
Mathew 18:33 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.
Luke 6:35 But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the Highest: for he is kind unto the unthankful and [to] the evil. 36 Be ye therefore merciful, as your Father also is merciful. 37 Judge not, and ye shall not be judged: condemn not, and ye shall not be condemned: forgive, and ye shall be forgiven.[/list:u]
Having mercy, compassion, forgiveness, loving your enemy is having that perfect spirit of the Father. But hating your enemy, condemning, judging, not forgiving is having
another spirit and that will not be forgiven.
So it appears to me that this is blasphemy against the spirit -- to have a spirit of hate, unmercy, unforgiveness, uncompassion, condemning, judging.