The person who is not strong enough gives up at the halfway point - but you are limiting yourself before even starting.
ConfuciusIf one learns from others, but does not think, one will be bewildered. If, on the other hand, one thinks but does not learn from others, one will be in peril.
ConfuciusChi Wen Tzu always thought three times before taking action. Twice would have been quite enough.
Confucius