One of my favorite quotes for depression is:
Watch your thoughts; they become words.
Watch your words; they become actions.
Watch your actions; they become habits.
Watch your habits; they become character.
Watch your character; it becomes your destiny.
Why is this one of my favorite quotes? Because it says everything in those five lines. Watch your thoughts. Why? Because they do become your words. If you are feeling depressed, the words that comes out of your mouth are depressing words. You can't help it. No way you can have depressing thoughts and be happy or say happy things without it having a depressing connotation to it.
Watch your words. Why? Because they become your actions. If your words are depressing, your actions will be too. Imagine being depressed. How do you look? You sit with your shoulders slumped, your head down, your breathing slow with long stressful sighs. Every movement is slow and deliberate, because it takes too much energy to go any faster, to try to get where you want to go.
Watch your actions. Why? Because they become habits. If you allow yourself to think depressing thoughts, causing your words to be depressing, causing your actions to become depressed, to cause yourself to have a depressing day, then what will stop it? You're depressed today, because you allowed it. What would stop you from becoming depressed tomorrow, or the next day, or the next? Watch your actions; because they do become habits.
Watch your habits. Why? Because they do become your character. If you allow yourself to get in the habit of being depressed, of not bothering to stop taking deep depressing breaths that your thoughts are causing, of not bothering to stop speaking of your depression and it's results, of not bothering to stop your actions from becoming your character, then you can just plan on being depressed until YOU decide that you don't want it anymore.
Watch your character. Why? Because it becomes your destiny. And you have just seen how. Take steps to change it now.