33. As a fletcher makes straight his arrow, a wise man makes straight his trembling and unsteady thought, which is difficult to guard, difficult to hold back.
34. As a fish taken from his watery home and thrown on dry ground, our thought trembles all over in order to escape the dominion of Mâra (the tempter).
35. It is good to tame the mind, which is difficult to hold in and flighty, rushing wherever it listeth; a tamed mind brings happiness.
DHAMMAPADA, Chapter 3. Thought