I am about to create new heavens.
Of course, there are many reasons to be unhappy and sad. Since there are struggles, diseases and sufferings in the world. However, being a Christian you are to have hope that heavenly Father takes care of human beings. For he is omnipotens creating only good things. He wills people to rejoice and to be happy. His aim is to make them joyful and peaceful. But, nonetheless, you are often depressed and feeling a bit low. It means that you need a cure from your Lord. You are to ask him to bring you up from your troubles and sadness. You ought to pray to preserve you from the pessimistic views of the reality you live in. Because you are supposed to sing praise to the Lord for everything he gives you day after day. For only God is able to change your life completely.