There are only two mistakes one can make along the road to truth: 1.) not going all the way; and 2.) not starting.
Three things cannot be long hidden: the sun, the moon, and the truth.
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.
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.
An insincere and evil friend is more to be feared than a wild beast; a wild beast may wound your body, but an evil friend will wound your mind.