Who says? You? That's your limit; not mine. Freedom of speech, and all that. You certainly can muzzle yourself, and apparently do. Congratulations.
There are two types of knowledge.
Type 1: empirically demonstrable and or logically-necessary (QUANTA).
Type 1 knowledge describes the INTERPERSONAL (SHARED) ENVIRONMENT that we humans navigate TOGETHER.
The other type of knowledge is GNOSIS (or, more specifically, indistinguishable from GNOSIS).
GNOSIS is direct, personal, private, experiential, qualitative, unfalsifiable, and most importantly, emotionally meaningful (QUALIA).
Now, of course, you CAN try and describe your GNOSIS (faith), but ultimately, even though this GNOSIS is extremely meaningful to you as an individual, it is unreasonable to expect anyone else to regard it as extremely meaningful to them.