We all have a part of our mind that has dark thoughts, though these thoughts can be fleeting at times they can also overwhelm. we all also have a part of our minds that suppress the dark thoughts. People who are down, suffering with depression etc for example and especially for a long time we start to lose that ability to suppress the thoughs they effectively cause us to lose their mind. You can rebuild on the losses but it does take time, please don’t listen to the dark thoughts they are lying to you. You are worthy you are not a burden.