Does God cause anxiety and depression?
Matt 6:34 Therefore do not be anxious about tomorrow; for tomorrow shall be anxious for its own things. Sufficient to the day is the evil of it.
John 14:Peace I leave with you, My peace I give to you. Not as the world gives do I give to you. Let not your heart be troubled, neither let it be afraid.
Luke 10:41 And Jesus answered and said to her, Martha, Martha, you are anxious and troubled about many things.
42 But one thing is needful, and Mary has chosen that good part, which shall not be taken away from her.
Jhn 14:1 Let not your heart be troubled: ye believe in God, believe also in me.
I think we experience evil things because we live in an evil world that is cursed. We are also under constant assult by the enemy.
I am not disagreeing with your post - just trying to clarify it a bit. There are times when God allows these things to plague us for His purpose - often times to refine us, train us, and humble us. Many times, anxiety and depression are brought on by circumstances and environment. I am not sure that being anxious is Godly.
Not sure what you mean by depression. Clinical or spiritual grief? - there is a huge difference.
I would also have to be very careful about saying that God gives us cancer. He may allow satan to attack us with it, as He allowed satan to give Job the boils. Maybe it's terminology

However, I agree with the gist of your post. We were bought with a price - if we are His bond slaves, we submit ourselves to whatever He wills.
Shalom, Nana