Abhyasa: continuous endeavor; constant practice; repetition; exercise; exertion (from A Concise Dictionary of Indian Philosophy; Sanskrit Terms Defined in English)
“And so I practice without knowing how it will all turn out. Clearly, along with clarity and faith, my commitment requires some will and effort. As Patanjali says in verse 14, establishing a firm foundation in practice requires sustained exertion over time. Commitment to practicing means I practice if it is easy for me, and I practice if it is hard for me. If I am bored, I practice; if I am enthusiastic, I practice; if I am at home, I practice; if I am on vacation, I practice. There is a saying in Buddhism: If it is hot, be a hot Buddha. If it is cold, be a cold Buddha. This is the consistency and determination in practice that Patanjali means when he speaks of abhyasa. In the beginning, this sustained exertion may be an act of will, an act of ego. But as we continue, the practice itself creates a momentum that propels us through the difficult moments of fear and boredom.”
-From Yoga Journal article, Hot Buddha Cold Buddha by Judith Hanson Lasater