In the Tarot the Knights in most decks ride on horseback. Each of the four Knights represents a different aspect of ourselves. How will we apply our focus? Will we steam in completely focussed on what we wish to achieve and risk losing other things (Knight of Swords)? Will we leap in at the first opportunity with both feet full of fire and enthusiasm but risk lacking the longevity to reach the end (Knight of Wands)? Will we methodically take one thing at a time and risk taking too long (Knight of Pentacles)? Or will we listen quietly to higher voices to help guide us but risk not actually making the dream a reality (Knight of Cups)? Or can we manage to balance our four aspects so that we can use all these skills exactly when they are called for? This will give us the best power and we will accomplish great things.
You should wear or have around you the symbol of horse when you wish to be more conscious of "Right use of Power". A spark to fire you off, the momentum to keep going, a focus to keep you eye on the goal, and the listening to check you are working for the greater good of all that is.