Rabbi Yisrael Salanter said:

The distance between the mouth and the heart is very great.  Many persons say great things but they do not carry them out, for their words do not flow from their hearts.  However, we must not stop talking about the great things in life, for some day our words will make an impression on our hearts and behavior.

(The 25th of Shevat is R Yisrael’s yartzeit- starting on the night of Jan 30, 2011)