When the true love for any action settles deeply and firmly into the heart, then it becomes easy for one to carry out that action. We have heard that there are some people who remain standing in the cinema from the night until the morning. Yet, if we have to say that a certain pious person performed fajr salaah with the wudhu of esha salaah, as he remained engaged in performing tahajjud salaah throughout the night, then people will express astonishment and amazement. The main thing that motivates a person and makes it easy for him to carry out an action is true love and enthusiasm for that action (therefore, one should make an effort to create the true love and enthusiasm in his heart for every aspect of deen).
(Suhbat Baa Awliyaa pg. 132)