Knowing what to say has everything to do with being mindful of the world around us. If we are not aware of the conditions around us, and others, in each moment, then obviously it makes it difficult to understand what words the situation calls for!! Being aware allows us to go beyond the obvious and express not just what's going on but how that affects people. The sign stating that the man was blind and needed help didn't explain the entire situation. Thus, when the girl stopped and wrote the new message with mindfulness of the situation, showing people in concrete words, what it means to be blind, the perceptions of the passers-by radically changed. Thus, the power of mindfully chosen words.
~Peace to all beings~