Helping others devaluates my own knowledge. And the tingling sound of money is superior to any „warm feeling“. I invested years of studying to achieve a certain base of knowledge – and this investion must not be in vain. As you might be familiar with the expression: Knowledge is power, power is success.
Edit:
Just to show that I am not greedy but rational: this might be helpful. http://www.leo.org/
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Of the gladest moments in human life, methinks is the departure upon a distant journey to unknown lands. -Sir Richard Francis Burton, 1856