"There is no greater impediment to the advancement of knowledge than the ambiguity of words. To this chiefly it is owing that we find sects and parties in most branches of science [and politics]; and disputes that are carried on from age to age, without being brought to issue."

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In daily life we must see that it is not happiness that makes us grateful, but gratefulness that makes us happy. It is necessary, then, to cultivate the habit of being grateful for every good thing that comes to you, and to give thanks continuously. And because all things have contributed to your advancement, you should include all things in your gratitude.

— Wallace D. Wattles