The first obstacle is grasping at the false self. This is removed by means of non-dual wisdom. To understand emptiness and the false self makes us not seek self-enjoyment.
The second obstacle is knowing no peace. This is removed by a compassionate heart that works to relieve all sentient beings from suffering. Through compassion, we are freed from restlessness.
The third obstacle is feeling worthy of offerings and reverence. This is removed by arousing love for all beings and applying skillful means to save them.
—Arya Vasubandhu, Treatise on the Pure Land