If we rail and kick against ...

If we rail and kick against it and grow bitter, we won\'t change the inevitable; but we will change ourselves. I know. I have tried it. I once refused to accept an inevitable situation with which I was confronted. I played the fool and railed against it, and rebelled. I turned my nights into hells of insomnia. I brought upon myself everything I didn\'t want. Finally, after a year of self-torture, I had to accept what I knew from the outset I couldn\'t possible alter.
If we rail and kick against it and grow bitter, we won't change the inevitable; but we will change ourselves. I know. I have tried it. I once refused to accept an inevitable situation with which I was confronted. I played the fool and railed against it, and rebelled. I turned my nights into hells of insomnia. I brought upon myself everything I didn't want. Finally, after a year of self-torture, I had to accept what I knew from the outset I couldn't possible alter.
 Dale Carnegie

Quotes from the same author

Do you know the most important trait a man can have? It is not executive ability; it is not a great mentality; it is not kindliness, nor courage, nor a sense of humor, though each of these is of tremendous importance. In my opinion, it is the ability to make friends, which, boiled down, means the ability to see the best in man.
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 Dale Carnegie
Happiness doesn't depend on any external conditions, it is governed by our mental attitude.
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 Dale Carnegie
Success is getting what you want. Happiness is wanting what you get.
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 Dale Carnegie
Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.
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 Dale Carnegie
When fate hands us a lemon, let's try to make lemonade.
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 Dale Carnegie