Sri Guru Hargobind Sahib outlined 14 principles for excellent speakers and 14 principles for listeners in 1626. For speakers, principles included maintaining an appropriate tone for the audience size, thoroughly elaborating topics, using examples, answering questions clearly, staying truthful, maintaining eye contact, and remaining humble. For listeners, principles were to believe strongly in the speaker, maintain attention without pride, understand meanings, ask intelligent questions, read extensively on topics, maintain concepts discussed, share knowledge, and follow teacher's instructions with a desire to learn rather than appear knowledgeable. Adhering to these principles would lead to enhanced awareness and a pleasurable life.