While he searched for enlightenment, Gautama combined the yoga practice of his teacher Kalama with what later became known as "the immeasurables".[dubious – discuss] Gautama thus invented a new kind of human, one without egotism.[dubious – discuss] What Thich Nhat Hanh calls the "Four Immeasurable Minds" of love, compassion, joy, and equanimity[full citation needed] are also known as brahmaviharas, divine abodes, or simply as four immeasurables.[web 5] Pema Chödrön calls them the "four limitless ones". Of the four, mettā or loving-kindness meditation is perhaps the best known.[web 5] The Four Immeasurables are taught as a form of meditation that cultivates "wholesome attitudes towards all sentient beings."[web 6][web 7]