A keenly developed sense of viveka allows a Yoga practitioner to discern between the preyas and shreyas. In Yogic philosophy, the preyas refer to actions and thoughts that are enticing and pleasurable in the short term, but are harmful in the long run. Shreyas, on the other hand, are actions and thoughts that are filled with nobility and divinity. Some of the virtues of the shreyas are compassion, love, sacrifice, and dharmic livelihood. Shreyas enhance spiritual growth.