Trials and tribulations offer us a chance to make reparation for our past faults and sins. On such occasions the Lord comes to us like a physician to heal the wounds left by our sins. Tribulation is the divine medicine.
We count on God's mercy for our past mistakes, on God's love for our present needs, on God's sovereignty for our future.
If the future and the past really exist, where are they?
There is no saint without a past, no sinner without a future.
Trust the past to the mercy of God, the present to His love, and the future to His providence.