That is the one weakness that has led me into the most trouble. Trying to be kind to others I often get my soul shredded into a kind of spiritual pasta.
In this world you have to take your bits and ends of kindness where you can find them, as they do not grow on trees.
Kindness came finally to the better ones. There was less self-interest. Less fear. Less competitive gamesmanship.
If you are kind, people may accuse you of selfishness. Be kind anyway. All the good you do today will be forgotten by others tomorrow. Do good anyway.