“The disadvantages of not undertaking joyous effort are described in the ‘Sutra Requested by Sagaramati’:
‘For the lazy, enlightenment is very far and far in all ways. In the lazy, generosity through wisdom does not exist. For the lazy, the welfare of others does not exist.’
And “Mindfulness of the Excellent Teaching” also says:
‘The one foundation of mental afflictions
Is laziness, no matter in whom.
He who has laziness by itself,
Does not have qualities whatsoever.’
You should think like this.”
From The Medium Treatise on the Stages of the Path to Enlightenment by Je Tsong Khapa
As translated in: Middle Length Lam-Rim with Trijang Rinpoche’s Additional Outlines by Lama Tsongkhapa (and Trijang Rinpoche). Translated by Philip Quarcoo. Unpublished DRAFT translation (May 2012) by FPMT, Inc. Download the PDF here.