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

“Yesterday I was clever, so I wanted to change the World. Today I am wise, so I am changing myself.”

Rumi (1207–1273) Iranian poet

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

Antonio Porchia (1885–1968) Italian Argentinian poet

“I am who I am today because of the choices I made yesterday.”

Eleanor Roosevelt (1884–1962) American politician, diplomat, and activist, and First Lady of the United States

“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.”

Groucho Marx (1890–1977) American comedian

“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

“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

“Never regret yesterday. Life is in you today, and you make your tomorrow.”

L. Ron Hubbard (1911–1986) American science fiction author, philosopher, cult leader, and the founder of the Church of Scientology

“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

“For the yesterdays and todays, and the tomorrows I can hardly wait for - Thank you.”

Cecelia Ahern (1981) Irish novelist