A happy man is too satisfied with the present to dwell too much on the future.

Life is like riding a bicycle. To keep your balance you must keep moving.

For the most part we humans live with the false impression of security and a feeling of being at home in a seemingly trustworthy physical and human environment. But when the expected course of everyday life is interrupted, we are like shipwrecked people on a miserable plank in the open sea, having forgotten where they came from and not knowing whither they are drifting. But once we fully accept this, life becomes easier and there is no longer any disappointment.

It is high time the ideal of success should be replaced with the ideal of service … Only a life lived for others is a life worthwhile.

— Albert Einstein (14 March 1879 – 18 April 1955)

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

Be less curious about people and more curious about ideas.

I am among those who think that science has great beauty. A scientist in his laboratory is not only a technician: he is also a child placed before natural phenomena which impress him like a fairy tale.

Humanity needs practical men, who get the most out of their work, and, without forgetting the general good, safeguard their own interests. But humanity also needs dreamers, for whom the disinterested development of an enterprise is so captivating that it becomes impossible for them to devote their care to their own material profit. Without doubt, these dreamers do not deserve wealth, because they do not desire it. Even so, a well-organized society should assure to such workers the efficient means of accomplishing their task, in a life freed from material care and freely consecrated to research.

You cannot hope to build a better world without improving the individuals. To that end each of us must work for his own improvement, and at the same time share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.

One never notices what has been done; one can only see what remains to be done.

Marie Curie (7 November 1867 – 4 July 1934) was a physicist and a pioneer in the field of radioactivity. She was the first woman to be awarded a Nobel Prize. More information about Marie Curie at Wikipedia.