“ To learn which questions are unanswerable, and not to answer them: this skill is most needful in times of stress and darkness. ”
Source: The Left Hand of Darkness
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To learn to read is to light a fire; every syllable that is spelled out is a spark. 
Don't just teach your children to read... Teach them to question what they read. Teach them to question everything. 
Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not. 
A single conversation across the table with a wise man is better than ten years mere study of books. 