Because the things which you do to your soulmate is an evidence of love.
The things which show love are evidences.
Things are proven by evidence.
An example of love would not be buying a daimond ring for your wife only but it would be more if you see her tired to take her to a good restaurant for dinner and not by telling her ok please cook noe so and so.
Love is not only by words but it is also by the acts you do.
whyteknight please give me two definitions of love.