Compassion plays a significant role in Vasubandhu's teachings as a co-founder of Yogachara Buddhism. According to Vasubandhu, compassion is an essential aspect of spiritual practice and a key to attaining enlightenment.

In Yogachara Buddhism, compassion is seen as the foundation of all moral virtues and the key to understanding the true nature of reality. Vasubandhu believed that the ultimate goal of spiritual practice is to develop compassion for all beings and alleviate their suffering.

One of the main teachings of Vasubandhu is the concept of "dependent origination," which states that all phenomena arise in dependence on causes and conditions. This includes the suffering of all beings, which is caused by ignorance and delusion. Through understanding this concept, one can develop compassion for all beings who are trapped in the cycle of suffering.

Vasubandhu also emphasized the importance of developing empathy and understanding towards others. He believed that by putting ourselves in the shoes of others and understanding their suffering, we can cultivate genuine compassion and work towards their liberation.

In addition, Vasubandhu taught the practice of "metta," or loving-kindness, which involves cultivating a genuine wish for the well-being and happiness of all beings. This practice is seen as a way to overcome self-centeredness and develop a deep sense of compassion for others.

Furthermore, Vasubandhu emphasized the importance of ethical conduct as a means to cultivate compassion. He believed that by following the moral precepts, one can develop a pure and compassionate mind, free from harmful thoughts and actions.

Compassion is also seen as a key component of meditation in Yogachara Buddhism. Vasubandhu taught various meditation techniques that focus on developing compassion, such as the "four immeasurables" meditation, which involves cultivating loving-kindness, compassion, empathetic joy, and equanimity towards all beings.

In summary, compassion is a central aspect of Vasubandhu's teachings in Yogachara Buddhism. It is seen as the foundation of moral virtues, a means to understand the true nature of reality, and a key to attaining enlightenment. By cultivating compassion, one can overcome self-centeredness and work towards the liberation of all beings from suffering.