“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.”

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

Groucho Marx (1890–1977) American comedian

“Yesterday is but a dream,
Tomorrow is only a vision.
But today well lived makes every yesterday a dream of happiness, and every tomorrow a vision of hope.”

Kālidāsa Classical Sanskrit writer

“Today's happy face, today's sad face.
Yesterday, a weak self, tomorrow, a strong self.
If it's you, who are you showing it to?
If it's I, whom should I show it to?”

Ayumi Hamasaki (1978) Japanese recording artist, lyricist, model, and actress

“Happy the man, and happy he alone,
He who can call today his own;
He who, secure within, can say,
Tomorrow, do thy worst, for I have lived today.”

John Dryden (1631–1700) English poet and playwright of the XVIIth century

“If in your own experience you haven't yet learned the truth of the deception of feelings, then you just have to go on believing and thinking, having faith in the past and hope in the future, being happy today and unhappy tomorrow, but never being in command of your own life for long.”

Barry Long (1926–2003) Australian spiritual teacher and writer

“I am not afraid of tomorrow
for I have seen yesterday
and I love today”

William Allen White (1868–1944) American newspaper editor and politician

“The advance of regret can be so gradual that it is impossible to say "yesterday I was happy, today I am not.”

E.M. Forster book Where Angels Fear to Tread

“I am in yesterday, today. And tomorrow? In tomorrow I was.”

Antonio Porchia (1885–1968) Italian Argentinian poet

“I am tomorrow, or some future day, what I establish today. I am today what I established yesterday or some previous day.”

James Joyce (1882–1941) Irish novelist and poet