Epictetus sums up perfectly one of my favourite teachings in Stoic Philosophy and it goes like this, "There is only one way to happiness and that is to cease worrying about things which are beyond the power or our will". You can not stop the monsoon from hitting your life, but you can decide how you feel about it and what you can do when it passes. This is how we retain our happiness and how we stay with a clear mind. Focus on your sphere of control and find a way to push through everything.
Happy listening.