Allah tells us in the Quran that he appointed a certain period of time to everything. It concerns difficulties and problems. Everything has a beginning and an end. Everything has appointed time. Every situation in our lives is the appointed time, after which comes to an end or change.
There were several periods of my life when this verse helped me so much and comforted me. It is "simple", but such a deep verse:
“Therefore, wait for the Judgment of your Lord with patience, We are surely watching over you”. (52:48)
This short verse contains many valuable lessons for the man:
Knowing that God sees that what we go through, and under His control, we should take comfort in this and endure until better times, knowing that He is with us.