To see a king in your dream indicates that success and prestige are within reach. You will rise above your problems and adversities. The king is symbolic of power and control. Alternatively, the king symbolises your father or some father figure. You are looking for support.
To dream that you are the king represents your masculine power. Alternatively, it indicates that you have attained a high level of authority and power. Perhaps you are becoming too domineering or overly confident.
In particular, dreaming of the king of heart card symbolises a compassionate male figure in your life. It may also mean that you are that compassionate person.