The Baal Shem Tov teaches, we should always see to it that our good-deeds don’t become stale – they should be passionate, like something new/fresh.
HOW TO DO GOOD
This is one of the fundamental Jewish teachings, that every time you do something (positive) it should be as if this is your first (hence filled with passionate joy.)
Furthermore a person should strengthen themselves like an iron rod, in their Avodas Hashem (in other words, part of passion is conviction.)
The Baal Shem Tov teaches that everything is a miracle, and the reason it seems natural, is because the miracles repeat – when we contemplate how everything is literally renewed miracles it becomes easier (to serve God with renewed energy.)