Hey Alex.
We all have to struggle with the things of the mind more so then one is led to believe.
Eph 6:12 Because our struggle is not against blood and flesh, but, against the principalities, against the authorities, against the world-holders, of this darkness, against the spiritual forces of wickedness in the heavenlies.
It is for this very reason that we are here,in the flesh,that is,so mankind can eventually be converted into a Spiritual being.
1Co 15:48 As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly.
1Co 15:49 And as we have borne the image of the earthy, we shall also bear the image of the heavenly.
The evil spirits that our God sends to chasten us is all part of His purpose for mankind.They certainly can take on different variations,but none the less, all is of God.
1Sa 16:14 But the Spirit of the LORD departed from Saul, and an evil spirit from the LORD troubled him.
These evil spirits can manifest as physical ailments as in a crippled woman;
Luk 13:11 And, behold, there was a woman which had a spirit of infirmity eighteen years, and was bowed together, and could in no wise lift up herself.
or as a deaf mute;
Mar 9:25 When Jesus saw that the people came running together, he rebuked the foul spirit, saying unto him, Thou dumb and deaf spirit, I charge thee, come out of him, and enter no more into him.
Mental ailments are also part of His plan,
2Ti 1:7 For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind.
Act 16:16 And it came to pass, as we went to prayer, a certain damsel possessed with a spirit of divination met us, which brought her masters much gain by soothsaying:
I guess my point Alex is,as hard as our troubles may seem to be in the flesh, they are all part of the process that God has deemed necessary for his creation,that being ,to experience some form of evil, be it in a physical form or a mental one, so that we can be humbled by it.
1Pe 4:12 Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
Ecc 1:13 it is an experience of evil Elohim has given to the sons of humanity to humble them by it.
He knows best of what condition we have to experience in order to become righteous sons and daughters. He's the boss.
Eph 1:11 In whom also we have obtained an inheritance, being predestinated according to the purpose of him who worketh all things after the counsel of his own will:
You,me, we can get through our trails because He has spoken it;
1Co 10:13 No trial has taken you except what is human. Now, faithful is God, Who will not be leaving you to be tried above what you are able, but, together with the trial, will be making the sequel also, to enable you to undergo it."
Its all a process that we should rejoice in because the end result is for our own good.
Col 1:24 Now I have joy in my pain because of you, and in my flesh I undergo whatever is still needed to make the sorrows of Christ complete, for the salvation of his body, the church;
When we come from an understanding that we are who we are, and experience the things that we experience because all is of God,we then can begin to understand that...
He causes us to under-go an evil condition and to overcome it by way of His Holy Spirit in order that His perfect plan and will in our lives can be seen for what it really is,which is, the purpose of becoming Spiritually mature and complete unto salvation.
Is it easy? No. But then again,who ever said it could or would be. Keep the Faith Alex,you are in training to be a son of The Most High.
Hope this helps some.
Peace...Mark