Dhyana comes only step by step with the gradual weakening of the vasanas by the Grace of the Master.

Devotee:  How does Karma help? Will it not add to the already heavy load to be removed?

Ramana Maharishi:  Karma done unselfishly purifies the mind and helps to fix it in meditation.

Devotee:  What if one meditates incessantly without Karma?

Ramana Maharishi:  Try and see. The vasanas will not let you do it. Dhyana comes only step by step with the gradual weakening of the vasanas by the Grace of the Master.