Alexander Graham Bell

Before anything else, preparation is the key to success.

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

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

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.