Focus on the mind and the soul. Read. Study. Enrol in a course of lectures. Pray. Become a member of a religious congregation. Study the Bible or other ancient works of wisdom.
Great wisdom is generous petty wisdom is contentious. Great speech is impassioned small speech cantankerous.
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The plan was criticized by some retired military officers embedded in TV studios. But with every advance by our coalition forces the wisdom of that plan becomes more apparent.