To love with a whole heart = being in each moment fully and feeling whatever is there whether it is immense joy or immense pain. To be with others fully and be with them while they are feeling immense joy or immense pain.
To love with a whole heart = being willing to be in all of it, all of the time.
To ride of ocean waves with grace and accept the ying and yang of life for all of its beauty, learning and storms.
This is my definition. What is yours?