Redemptive suffering is a mystery (small "m"). The principle of redemptive suffering is inherent throughout nature. Beauty, life, and growth all come about as the result of struggle, pain, and sacrifice.
We will all suffer. The question is whether we will suffer for righteousness sake or for sin's sake. The choice is ours. And God may very well use our sacrificial suffering in His plan of redemption. We do not know. We do know that Christ alone redeems, but He also allows us to participate in that redemption. After all, we choose to receive Our Lord or deny Him.
It is better to suffer now, for a while, than to suffer eternally. It is better to personally suffer so that others may find peace, rather than to seek personal peace at the expense of our fellow man.
I would appear that the Scriptures teach redemptive suffering:
"Greater love has no one than this, than to lay down his life for his friends." [St. John 15:13]
"Most assuredly, I say to you, unless a grain of wheat falls into the ground and dies, it remains alone; but if it dies, it produces much grain." [St. John 12:24]
"If any man will come after me, he must deny himself, take up his cross daily, and follow Me." [St. Luke 9:23]