A powerful general will prefer difficult military assignments because he wants to show his strength and abilities when he is victorious.
Similarly, if you feel strong love for another person, you will experience joy when you find opportunities to express the full extent of love for that person.
So, too, when you have a strong love for the Almighty, the greater the obstacles in your path when trying to serve Him, the more joy you will experience - because this is an opportunity to show the strength of your commitment.
The next time you face an obstacle, focus on the fact that this enables you to feel greater love for the Almighty. Feel a sense of joy and empowerment that you can express your love by overcoming obstacles.
(see Rabbi Moshe Chaim Luzzatto - Path of the Just, ch.19)