Molière's play 'Tartuffe' is a satirical comedy that critiques religious hypocrisy through the character of Tartuffe, who manipulates Orgon and his family under the guise of being a pious man. The play explores the conflict between reason and passion, emphasizing the need for rational thought to counter blind faith and obsession, as exemplified by the character Cleante. Ultimately, Molière advocates for honesty and integrity, revealing the dangers of succumbing to deceitful appearances in religious and social contexts.