The Heart is like a garden, it can be full of flowers or full of weeds. To make a good garden you must water it, tend to it and pull those weeds. Your heart is very similar, it is full of love but it can be full of hate, envy, lust and dismay. You have to pull those weeds to let the love and kindness to grow, if you allow the other emotions get out of control they will choke off the love and kindness in your heart. The balance within your heart has to be pro love and kindness or like a garden full of weeds it will produce very poor quality flowers and many will die. Accepting kindness and love from others is like the sunshine and rain to a garden. It helps the love within your heart grow and spread.
Tend your heart as you would your garden and it will blossom with love and kindness.