Quotes on Monkey Mind

I am burdened with what the Buddhists call the 'monkey mind' -- the thoughts that swing from limb to limb, stopping only to scratch themselves, spit and howl.

But then with me the horrid doubt always arises whether the convictions of man's mind, which has been developed from the mind of the lower animals, are of any value or at all trustworthy. Would any one trust in the convictions of a monkey's mind, if there are any convictions in such a mind?