We must utilize all of our senses to learn Torah. Therefore it had to be initially received with clarity. The whole experience at Mt. Sinai is referred to as Ma'amad Har Sinai, the standing at Har Sinai, to imply that they stood on their own two feet and used their clear senses. This is why we stay up all night to study Torah, to be awake with open eyes and an open mind. Hashem gave man an unbelievably powerful intellect.
Man can develop almost anything.
We see this all the time with man's scientific and technological advances which are mind boggling. He gave us a great mind to meet the challenge of Torah study. Because it would be disrespectful for the Kohen to be exposed when climbing up to the Altar. Please preserve the sanctity of this bulletin. It contains words of Torah and should be treated with respect.