That song says '...just like a single word can make a heart open...' (Fight song - Rachel Platten) Words are singularly the most powerful force available to humanity. It is a double-edged sword. We can choose to use this force constructively with kind words of encouragement, or destructively using hateful acidic words. The same song says '...I might only have one match (tongue, in this case) , but I can make an explosion...'
Live. Love. Learn. and by all means, Laugh.