Behold, thou desirest truth in the inward parts.
–Psalm 51:6 (KJV)–

They that sow in tears shall reap in joy.
He that goeth forth and weepeth,
bearing precious seed,
shall doubtless come again with rejoicing,
bringing his sheaves with him.
–Psalm 126:5-6 (KJV)–

Be afflicted, and mourn, and weep:
let your laughter be turned to mourning,
and your joy to heaviness.
–James 4:9 (KJV)–

Blessed are they that mourn:
for they shall be comforted.
–Matthew 5:4 (KJV)–

Jacob rent his clothes, and put sackcloth upon his loins,
and mourned for his son many days.
–Genesis 37:34 (KJV)–

Word came unto the king of Nineveh,
and he arose from his throne,
and he laid his robe from him,
and covered him with sackcloth,
and sat in ashes.
–Jonah 3:6 (KJV)–

A time to weep, and a time to laugh;
a time to mourn, and a time to dance.
–Ecclesiastes 3:4 (KJV)–

Whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.
–Philippians 4:8 (KJV)–

—

John Wesley, “Heaviness Through Manifold Temptations.”

Got Questions, “Is There Any Power In Positive Thinking?”

—. “What Does the Bible Say About Mourning?”

June Hunt, How to Handle Your Emotions (Harvest House Publishers, 2008), ch. 2.

Ray Comfort, How to Battle Depression and Suicidal Thoughts (Genesis Pubs, 2017).

David Wilkerson, Have You Felt Like Giving Up Lately? (Revell, 1982).

—. Man, Have I Got Problems (Pyramid, 1973).

Stephen Hill, Time to Weep (Creation House, 1997).