Swami Sivananda's words of wisdom - Essence of Vedanta

A person who has got an active temperament, takes to the Yoga of Action. It is meditation on the spiritual reality through action (Karma Yoga). Yoga may also be meditation through love of God (Bhakti Yoga), or it may be meditation through will (Raja Yoga), or it may be meditation through wisdom (Jnana Yoga). But all Yogas are processes of meditation, meditation on the ultimate spiritual reality which is everywhere without which we cannot exist, without which we cannot think. Nothing is possible without its existence.

Essence of Vedanta - Swami Sivananda