What does the Bible say about depression and sadness?

“Why are you in despair, my soul? Why are you disturbed within me? Hope in God! For I shall still praise him, the saving help of my countenance, and my God.”

“He heals the broken in heart, and binds up their wounds.”

““Come to me, all you who labor and are heavily burdened, and I will give you rest. Take my yoke upon you and learn from me, for I am gentle and humble in heart; and you will find rest for your souls. For my yoke is easy, and my burden is light.””

“Now may the God of hope fill you with all joy and peace in believing, that you may abound in hope in the power of the Holy Spirit.”

“The LORD is near to those who have a broken heart, and saves those who have a crushed spirit.”

“Don’t you be afraid, for I am with you. Don’t be dismayed, for I am your God. I will strengthen you. Yes, I will help you. Yes, I will uphold you with the right hand of my righteousness.”

“We are pressed on every side, yet not crushed; perplexed, yet not to despair; pursued, yet not forsaken; struck down, yet not destroyed;”

“I waited patiently for the LORD. He turned to me, and heard my cry. He brought me up also out of a horrible pit, out of the miry clay. He set my feet on a rock, and gave me a firm place to stand. He has put a new song in my mouth, even praise to our God. Many shall see it, and fear, and shall trust in the LORD.”