Who or What causes Problem of Suffering?

Suffering may be "THE RESULT OF OUR ACTIONS"

"For every action there is equal and opposite reaction." Cosmic Law of Cause and Effect

"Consider it pure joy, my brothers, whenever you face trials of many kinds,
because you know the testing of your faith develop perseverance.
Perseverance must finish its work so that you may be mature and complete,
not lacking anything" James 1:2-4

Suffering may be "THE WORK OF SATAN"

"No temptation has seized you except what is common to man. And God is
faithful; he will not let you be tempted beyond what you can bear.
But when you are tempted, he will also provide a way out so that you can
stand up under it" I Corinthians 10:13

Suffering may be "THE CHASTISEMENT OF GOD"

"When we are judged by the Lord, we are being disciplined so that we will
not be condemned with the world" I Corinthians 11:32

"And you have forgotten that word of encouragement that addresses you as sons:
"My son, do not make light of the Lord's discipline,
and do not lose heart when he rebukes you,
because the Lord disciplines those he loves,
and punishes everyone he accepts as a son"
Endure hardship as discipline; God is treating you as sons. For what son is not
disciplined by his father? If you are not disciplined, then you are illegitimate
children and not true sons" Hebrews 12:5-8

A Time for Everything

There is a time for everything,
and a season for every activity under heaven:

a time to be born and a time to die,
a time to plant and a time to uproot,
a time to kill and a time to heal,
a time to tear down and a time to build,
a time to weep and a time to laugh,
a time to mourn and a time to dance,
a time to scatter stones and a time to gather them,
a time to embrace and a time to refrain,
a time to search and a time to give up,
a time to keep and a time to throw away,
a time to tear and a time to mend,
a time to be silent and a time to speak,
a time to love and a time to hate,
a time to war and a time for peace.

- ECCLESIASTES 3:1-8