In the Sutras, Buddha says:
If you have only effort you have all Dharmas,
But if you have only laziness you have nothing.
A person who has no great knowledge of Dharma but who nevertheless applies effort consistently will gradually attain all virtuous qualities; but a person who knows a great deal and has only one fault - laziness - will not be able to increase his or her good qualities and gain experience of Dharma.
How to Understand the Mind