conscience - 致良知

We are always guided by our guardian angel, but most of the times we feel lost connection with it. Why? because our conscience is covered by "dust", ie, when we do something minor "evil" against our conscience, little by little, those dust will accumulated on the surface of the "mirror" - our conscience. In a long run, we lost guidance from our guardian angel. Mr. Yangming asked us to recover our conscience, like a Buddhist monk once said in his poem:
Our body is like a bodhi tree,
our heart is like a mirror,
we have to clean it time from time,
lest it is covered by dust.

给中文读者再加一句，咱们共勉:
勿以善小而不为
勿以恶小而为之
切切。