[from Quotable Jesus blog]
Keep in mind this biblical promise. I have to admit, I feel in a state of mourning over this world and where things are going.
God understands when we feel sad or mourn over lost people or the state of this world. There is a reason today while Christians may feel deep grief which is tied into our longing to be "home" or to be free or delivered from the evil, disappointment and chaos of this world. We can of course mourn over our own sins as we take those to the Lord too. If you feel sick to your stomach about the state of the world and have even felt tears coming on about it all, I understand.
One thing about being a Christian, we are to mature in the Lord, knowing that the world seeks escape from reality and false bubbles of delusions. This is like the people making merry while the flood waters rose which Noah tried to warn them of. Christians may be told by others, they are too serious, too mournful, but realize especially today, they want those who live as "sotted children" [Jer 4:55] have been indoctrinated into living for their own pleasure and enjoyable escapes. They will not face what is to come.
God will comfort us, in this world too if we ask Him and pray. If you feel sad though and feel mourning lately, I understand. How else would those with emotions and a heart for God feel among evil? God understands our sorrow. We need to not give into sin, in our sadness but turn to Him for comfort and solace.