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Be slow to fall into friendship; but when thou art in, continue firm & constant.

Socrates, Plato, Aristotle (1967). “Wit and Wisdom of Socrates, Plato, Aristotle: Being a Treasury of Thousands of Glorious, Inspiring and Imperishable Thoughts, Views and Observations of the Three Great Greek Philosophers, Classified Under about Four Hundred Subjects for Comparative Study”
Be slow to fall into friendship; but when thou art in, continue firm & constant.