I had some hesitations about ...

I had some hesitations about philosophy because, if you worked out a philosophical theory, it was hard to know whether you were going to be able to prove it or whether other theories had just as good a claim on belief.
I had some hesitations about philosophy because, if you worked out a philosophical theory, it was hard to know whether you were going to be able to prove it or whether other theories had just as good a claim on belief.
 Stephen Cole Kleene

More phrases

It really is all about believing in yourself: 80 per cent mental, 20 per cent physical.
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 Victoria Pendleton
I believe however that peace is attainable regardless of the Arabs mentality, society or government.
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 Yitzhak Rabin
You have inside you the capacity to invest your mental, emotional, and spiritual gifts in a way that glorifies God, impacts the world, and satisfies your own soul. I believe that-and I want you to believe it, too.
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 David Jeremiah
The 'Goonies' are a close knit group. They believe in themselves, even though there are doubters throwing darts at them outside...'Goonies never say die.' That's pretty in line with the mentality of our team.
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 Robin Lopez
I believe that there's no improvement if you have an inferiority complex and victim mentality.
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 Kim Nam-joon

Quotes from the same author

I went to Princeton in the fall of 1930 as a half-time instructor.
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 Stephen Cole Kleene
The job in Wisconsin was the first genuine offer of an academic job in a university which I received.
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 Stephen Cole Kleene