Seneca

Enjoy present pleasures in such a way as not to injure future ones. - Seneca

Voltaire

J'ai décidé d'être heureux parce que c'est bon pour la santé.
I have decided to be happy because it's good for my health.

Paolo Coelho

The pain of yesterday is the strength of today.

Ta douleur d'hier est la force d'aujourd'hui 

John F. Kennedy

The time to repair the roof is when the sun is shining.
- John F. Kennedy

Paolo Cohello

Only one thing makes a dream impossible: the fear of failure

Albert Camus

An intellectual is someone whose mind watches itself. Albert Camus

Benjamin Dover

It's okay to look back at the past. Just don't stare