Be Careful What You Think

I’ve found a couple varieties of the following quotes. I see them quoted frequently, but I can’t seem to find a good source of what actually said what. If anyone has any useful information about what was originally said and who said it, I would appreciate learning from you.

Be careful what you think…
Your thoughts become your words, Your words become your actions
Your actions become your habits, Your habits become your character
Your character is everything

Be careful what you think, for your thoughts become your words.
Be careful what you say, for your words become your actions.
Be careful what you do, for your actions become your habits.
Be careful what becomes habitual, for your habits become your destiny.

Be careful what you think, for your thoughts become your words.
Be careful what you say, for your words become your actions.
Be careful what you do, for your actions become your character.
And character is everything.