Lama Zopa Rinpoche teaches on the negative mind and the nature and value of bodhicitta, especially for those wishing to cultivate world peace. 

Lama Yeshe explains how to investigate the space-like nature of all phenomena and establish right view, so that students can gain a clear understanding of tantra.

Lama Thubten Yeshe: Bodhicitta—The Perfection of Dharma