Spiritual depression can dog your Christian life. Actually, however, there are times even when we know those things that we may experience normal human emotions. When we lose someone like that, it may feel devastating. It is not unChristian to feel pain or loss. Tears are often mentioned in the Bible, and they are not always tears of joy.
Sadness is, at times, an equally fitting emotion as joy.
Tears are mentioned as often as laughter. There are times when we feel as though our life, or some significant portion of it have been wasted. There are also times when we feel that the enemy is so invincible that we cannot possibly vie with him. And there are times when we feel estranged from God, hopeless in this world, and unable to place one foot in front of another. Whether that is a frequent problem in your life, or an infrequent one, it is a common problem in life.