The ancestor of every action is a thought

 

What we think, we become.
All that we are arises with our thoughts.
With our thoughts, we make the world.
- The Buddha

The ancestor of every action is a thought.
- Ralph Waldo Emerson

A man is but the product of his thoughts -
what he thinks, he becomes.
- Mohandas (Mahatma) Gandhi

Your worst enemy cannot harm you as much as
your own unguarded thoughts.
- The Buddha

Further reading: Your Inner Thoughts

Life Is A Mirror

Choose Not To Stress