There is nothing more dreadful than the habit of doubt. Doubt separates people. It is a poison that disintegrates friendships and breaks up pleasant relations. It is a thorn that irritates and hurts, it is a sword that kills.

Neither naked asceticism, matted hair, dirt, fasting, sleeping on the ground, dust and mud, nor prolonged sitting on one's heels can purify a man who is not free of doubts.

Although individuals may be highly intelligent, they are sometimes dogged by skepticism and doubts. They are clever, but they tend to be hesitant and skeptical and are never really able to settle down. These people are the least receptive.

One can be deceived by three types of laziness:
of indolence, which is the wish to procrastinate;
the laziness of inferiority, which is doubting your capabilities;
and the laziness that is attachment to negative actions, or putting great effort into non-virtue.