In short, my behaviour. Whether it is walking every day or how I react to someone being shitty to me. Nothing else is in my control. My boss could be an absolute twat to me and all I can do is control my own reaction. I could tell someone a sob story and if they choose to laugh, that’s on them. Can’t control the weather either. Which means that if I want to walk every day, then I’m going to have to accept the weather the way it is right then and there. All this also means that if I want to see changes in whatever, it had better be me making those changes happen.
So yeah, it’s what the above meme says: I cannot control or change the people around me, but I can change who I surround myself with.