386
Śrīmad-Bhāgavatam
[Canto 5, Ch. 11]
guṇa-anuraktam —being attached to the material modes of nature;  vyasanāya —for the conditioning in material existence;  jantoḥ —of the living entity;  kṣemāya —for the ultimate welfare;  nairguṇyam —being unaffected by the material modes of nature;  atho —thus:  manaḥ —the mind;  syāt —becomes;  yathā —as much as;  pradīpaḥ —a lamp;  ghṛtavartim —a wick within clarified butter;  aśnan —burning;  śikhāḥ —the flame;  sādhūmāḥ —with smoke;  bhajati —enjoys;  hi —certainly;  anyadā —otherwise;  svam —its own original;  padam —position;  tathā —so;  guṇa-karma-anubaddham —bound by the modes of nature and the reactions of material activities;  vṛttiḥ —various engagements;  manaḥ —the mind;  śrayate —takes shelter of;  anyatra —otherwise;  tattvam —its original condition.
TRANSLATION
When the living entity's mind becomes absorbed in the sense gratification of the material world, it brings about his conditioned life and suffering within the material situation. However, when the mind becomes unattached to material enjoyment, it becomes the cause of liberation. When the flame in a lamp burns the wick improperly, the lamp is blackened, but when the lamp is filled with ghee and is burning properly, there is bright illumination. Similarly, when the mind is absorbed in material sense gratification, it causes suffering, and when detached from material sense gratification, it brings about the original brightness of Kṛṣṇa consciousness.
PURPORT
It is therefore concluded that the mind is the cause of material existence and liberation also. Everyone is suffering in this material world because of the mind: it is therefore proper to train the mind or to cleanse the mind from material attachment and engage it fully in the Lord's service. This is called spiritual engagement. As confirmed in  Bhagavadgītā :
mām ca yo 'vyabhicāreṇa bhakti-yogena sevate sa guṇān samatītyaitān brahma-bhūyāya kalpate