Thought is the glorification of truth; therefore, bad thoughts are those which have not been thought through to the end.
In order that a lamp can give good light, you should put it in a place protected from the wind. If the light is in the wind, then it will leave long, trembling shadows. So too will bad thoughts drop shadows on the white surface of your soul.
— Indian Wisdom
Establish your purpose when you are alone and without temptations.
— Jeremy Bentham
Meditation is the way to eternity; lightheartedness is the way to death. Those who meditate never die; those who are lighthearted remind me of death.
— Buddhist Wisdom