What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to quit until he finds it.
Alexander Graham Bell
When one door closes another door opens; but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us.
Alexander Graham Bell
It is not the mountain we conquer, but ourselves.