The faith that stands on authority is not faith.
Great geniuses have the shortest biographies.
Science does not know its debt to imagination.
Little minds have little worries; big minds have no time for worries.
Do not go where the path may lead, go instead where there is no path and leave a trail.
The reward of a thing well done is having done it.
Nature is a mutable cloud which is always and never the same.
A hero is no braver than an ordinary man, but he is brave five minutes longer.
