“Concentrate all your thoughts upon the work at hand. The sun’s rays do not burn until brought to a focus.”

—Alexander Graham Bell.

“When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us.”

—Alexander Graham Bell. 

“Man is an animal which, alone among the animals, refuses to be satisfied by the fulfilment of animal desires.”

—Alexander Graham Bell.