(1) According to the textbook content, being kind to others means treating others with a kind heart;

(2) Kindness is a sincere and broad love, helping others, experiencing the joy of life, and empathizing with others , don’t do to others what you don’t want others to do to you; answer accordingly;

So the answer is:

(1) Being kind to others means treating others with a kind heart;

(2) Help others, experience the joy of life, be considerate of others, and do not do to others what you do not want others to do to you.