“I, not events, have the power to make me happy or unhappy today. I can choose which it shall be. Yesterday is dead, tomorrow hasn't arrived yet. I have just one day, today, and I'm going to be happy in it.”

“Yesterday is dead, tomorrow hasn't arrived yet. I have just one day, and I'm going to be happy in it.”

“Each morning when I open my eyes I say to myself: I, not events, have the power to make me happy or unhappy today.”

“Today I realized that what I wrote yesterday I really wrote today: everything from December 31 I wrote on January 1, i.e. today, and what I wrote on December 30 I wrote on the 31st, i.e. yesterday. What I write today I'm really writing tomorrow, which for me will be today and yesterday, and also, in some sense, tomorrow: an invisible day. But enough of that.”

“I’m here today because of my decisions yesterday. So I can change my tomorrow today, but I can’t change my today today. This makes the me of yesterday offensive to the me of today.”

“Yesterday I was sad, today I am happy! Yesterday I had a problem, today I still have the same problem! But today I changed the way I look at it!”