Why does God allow suffering?
Sovereign Purpose

God is the creator (Elohim) and we are the creatures. He is then at will to do anything He wants with us and through us. This means then that there are moments that we will not fully understand the reasons for His allowing sufferings to fall on believers apart from that He does what He knows is righteous. Deuteronomy 29:29 states The secret things belong to the LORD our God, but the things revealed belong to us and to our children forever, that we may follow all the words of this law.
When Job went through great suffering, his friends assumed that they knew the mind of the Almighty by declaring that Job had sinned and that God was punishing him for his sins. Job on the other hand went on the defensive and justified himself to be guiltless to the point of declaring God unjust for punishing a righteous man. When confronted by God about his accusations, Job realized himself to be a fool and God’ wisdom too high for him. He observes in Job 42:3, Surely I spoke of things I did not understand, things too wonderful for me to know.
There are times suffering can not be explained away. It is in the infinite wisdom of God. And as the singer said when we get to heaven, we shall understand it by and by.