Ramana MaharshiIs it not because you are knowledge [i.e. consciousness] itself that you are able to know the world? If instead of knowing the world you turn your attention, taking that Consciousness alone as your target, It will Itself as the Guru reveal the Truth [i.e. Reality].

Ramana Maharshi

Karma Yoga
Path of Action

Reference Materials:

Video/Audio Lectures

Swami Anubhavananda
Karma Yoga - A Way to Bliss Within and Joy Around (~75 min talk)

Karmayoga A Way to Bliss Within and Joy Around

Swami Sarvadevananda
Karma Yoga - The Science of Work (~75 min talk)

Swami Sarvadevananda on "Karma Yoga: The Science of Work"

Swami Tyagarupananda
Karma Yoga and Swami Vivekananda (~90 min talk)

Swami Tyagarupananda at IIT Kanpur -Karma Yoga and Swami Vivekananda