There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

Be wary of passing the judgment: obscure. To find something obscure poses no difficult, elephants and poodles find many things obscure.

The greatest events occur without intention playing any part in them; chance makes good mistakes and undoes the most carefully planned undertaking. The world's greatest events are not produced, they happen.

Non cogitant, ergo non sunt.

I cannot say whether things will get better if we change; what I can say is they must change if they are to get better.

To err is human also in so far as animals seldom or never err, or at least only the cleverest of them do so.

Many are less fortunate than you' may not be a roof to live under, but it will serve to retire beneath in the event of a shower.