In the LeM of Rav Nachman [of Breslov] Vol I. chapter 22 is brought the idea that when the sound of holiness sounds further. against it is automatically the sounds of the Dark Side also come forth. From this you see why when you try especially hard in the service of God, you always find the Dark Side comes back at you especially strongly. From this I have found it better to take a lower profile.

[When learning Torah or doing some public service, it is always better to be as discreet as possible. However still when one learns Torah, at least one must says the words--at least as a whisper. Otherwise one does not fulfill the commandment to learn Torah. [And in fact saying the words helps in understanding as the sages say in Avot rather that read the Torah is a tree of life for those that find it read it is a tree of like for those that say the words [at least as a whisper] עץ חיים היא למוצאיהם אל תקרא למוצאיהם אלא למוציאיהם