"Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus."
– Alexander Graham Bell
"It is easier to fight for one's principles than to live up to them."
– Alfred Adler
"Life is like music; it must be composed by ear, feeling, and instinct, not by rule."
– Samuel Butler
"Start by doing what's necessary; then do what's possible, and suddenly you are doing the impossible."
– St. Francis of Assisi
"A day of worry is more exhausting than a week of work."
– John Lubbock