Miguel de Unamuno Thinking Quotations

Whenever a man talks he lies, and so far as he talks to himself - that is to say, so far as he thinks, knowing that he thinks - he lies to himself. The only truth in human life is that which is physiological. Speech - this thing that they call a social product - was made for lying.

Piensa el sentimiento, siente el pensamiento." (roughly translated, "Think about the emotional and feel the intellectual")

The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.