You are enjoying material gains due to your spiritual strength!
Keep in mind that we often think “material” gains means money or wealth, but it could be as simple as having plenty of food to eat, or a reliable vehicle, a warm home, or any number of other things.
The angels are reminding you to think on what you have, and to be thankful. You are blessed, and that blessing is due to your spiritual strength and hard work.
Continue on your righteous path, and you will continue to enjoy the rewards that it brings.