Sustained effort will bring about results. You may fix up a certain time for meditation as a daily routine

Ramana

 (from "More Talks With Ramana Maharshi"): 

Bhagavan Ramana has unravelled the mystery of the universal truth, the real behind the apparent. It is in this context his emphasis on self-enquiry assumes importance. The penetrating search within opens up awareness of pure consciousness.

He said: "Effort is needed. If the mind becomes single-pointed it becomes a great force and can turn inward to the heart easily.''

"One's effort is essential. It is only the wise endowed with equanimity and renouncing the fruit of action who are freed from the shackles of birth and death. They concentrate exclusively on Self-knowledge."

Q: At times the meditation becomes easy, but that remains only for a short period- and it is again disturbed by unwanted thoughts.

Bhagavan: "Yes - may be - resist the thoughts - you should have more willpower to obtain steadfastness. Slight disturbances should be ignored, taking care to pursue further without a break. Sustained effort will bring about results. Moreover, you may fix up a certain time for meditation as a daily routine which will go a long way for development!"