This is a great question.
WHY SUFFERING… could it be suffering 1) brings repentance. 2) may strengthen our walk and faith 3) prove how great GOD is, even for the rebellious also. In suffering for righteousness sake 1) We over come like Jesus did. 2) to receive our rewards in eternity 3) to overcome and be the people spoken of in Revelations to sit in his throne, get a white stone, a new name etc 3) to become the Bride without spot or blemish instead of those under the altar. I think this is all about being like Jesus. Holy as he is holy. (?)
Yes we should be very glad about becoming a vessel of honor even in suffering. We should shout for joy and be like Paul and all who suffered in the Word, even as our Master did.
I see varying issues with suffering in the Word. The Word says those who are in Christ /Yeshua the Messiah will be persecuted for righteousness sake.
I see two kingdoms the Kingdoms in Scripture… the Kingdom of GOD and the Kingdom of Satan or Sin. We choose each day who we will serve. We may well be Christians and still have an area we are severing another master ie… being bitter, accusing or a division maker.
Jesus / Yeshua said, a house divided can not stand. Jesus / Yeshua told us the murder the thief comes to kill steal and destroy, that we are not wrestling flesh and blood. Jesus /Yeshua said we also suffer for His sake. Even in the OT the prophets were killed for speaking for GOD.
James said, GOD is not evil cannot be tempted with evil & never tempts any man. GOD’S judgement is always righteous and good for all.
It also says that people suffer under the hands of cruel oppressors (people have sin and lusts). Some suffer from their own ignorance or evil choices.
The main thing is WHO causes what types of suffering.
Of course we know from the beginning of Lucifer’s fall iniquity entered (he disobeyed having a thought to be “like” the Most high in righteousness NOPE, he was power hunry, prideful and insane) … the angels suffered from Satan’s sales pitch & mutinied against the Creator. In the garden - Adam had the final say he knew the 1 commandment "do not eat of the tree of the KNOWLEDGE of good and evil. Adam disobey and now we have 66 books !! We are no different Isa_59:2 But your iniquities have separated between you and your God, and your sins have hid his face from you, that he will not hear. Yet GOD loves us and will hear a repentant humble heart. His Grace is sufficient for us to overcome.
We live in a fallen world. People suffer from that. Jesus/Yeshua redeemed us back from the enemies kingdom so that we may appropriate what He did and do what he did in our life and to help others.
Jesus was a man (and Messiah) who was approved by GOD with miracles and signs and He received the baptism of the Holy Spirit… He was YHWH of the OT and He came as the suffering servant through Mary to show us how to overcome all the power of the enemy and receive eternal life… We do this through righteous endurance through applying His Word and obeying it. We are then doers and not hears only deceiving our own selves.
Once we are born again we are reconnected to GOD. From there we walk - carrying our cross like He did. Jesus/ Yeshua over came the power of the enemy and death and hell… and he gave us the same Holy Spirit to do the same.
Grace is both the divine intervention on the human heart to appropriate (do) what He has said in His Word through being obedient. and the help in times of need when we miss the mark through His unmerited favor. In the Hebrew grace has more than one meaning.
I see people suffer due to ignorance of the Scripture and also because people reject the Scripture.
Hos 4:6 My people are destroyed for lack of knowledge: because thou hast rejected knowledge, I will also reject thee, that thou shalt be no priest to me: seeing thou hast forgotten the law of thy God, I will also forget thy children.
People may suffer from choosing sin over obedience. Or they omit the Scriptures.
We could suffer due to another persons sin which victimizes us.
People may have toxic thoughts and emotions… we can be tempted in these things like Sorrow, grief, un-forgiveness, bitterness, anger, cruelty rejection, a broken spirit, rejection envy, jealousy, false gods, addictions, fears of every kind, dabbling with any form of occultism… We are told to take thoughts captive and every vain imagination… we can hold onto stuff and it becomes sin. This could bring suffering.
Some suffer for righteousness sake. This is where we should be glad in suffering. This is what I see in the Scripture.
These are random thoughts I had about your post.