prāyaśaḥ puṇdarīkākṣa
yuñyanto yogino manaḥ
viṣīdanty asamādhānān
mano-nigraha-karśitāḥ
prayasah -- for the most part; pundarika-aksha -- O lotus-eyed Lord; yunjantah -- who engage; yoginah -- yogis; manah -- the mind; vishidanti -- become frustrated; asamadhanat -- because of inability to attain trance; manah-nigraha -- by the attempt to subdue the mind; karsitah -- weary.
Without the shelter of the Supreme Lord, a yogi easily becomes discouraged in the difficult task of fixing his mind on the Supreme.