But when man begins to learn the influence which mind can exert over mind, a new desire is awakened of _moral power_. All the different modes are then sought by which one mind can bend the will of others to yield to its controlling influence. It is this desire which is gratified when the conqueror of nations beholds millions of minds yielding to the slightest word of his command. It is this which inspires the orator, as he pours forth that eloquence which charms the delighted throng, and bends them to his will. It is this desire, which often becomes the master passion, to which is sacrificed all that is just, lovely, and benevolent. Another cause of enjoyment is that of sympathy in the happiness of others. This susceptibility is a source of constant enjoyment when those around us are contented and happy. None can be ignorant of the change produced in passing from the society of a sprightly, cheerful, and happy group to a circle soured by discontent or overwhelmed with melancholy. In early childhood, the effect of this principle is clearly developed. Even the infant child is affected and disturbed with flowing tears, and steals away from the chamber of sorrow, while the sight of smiling faces and the sound of cheerful voices sends through his heart the glow of delight. Another source of enjoyment is a feeling of conscious rectitude. Man is so constituted that, when he knowingly violates the principles of rectitude, a painful feeling is the inevitable consequence, while a habit of constant conformity to them brings a peaceful and happy state of mind. Another source of happiness is the consciousness of being the cause of happiness to others. This is an enjoyment entirely distinct from that of sympathy in the happiness of others; for we may see happiness conferred by another and rejoice in it, but the pleasure of being ourselves the cause of this enjoyment is one altogether peculiar. It can readily be seen that the more benevolent a mind is, the more happiness it will derive from this source; while in exact proportion as the mind is selfishly engrossed by its own exclusive interests will this stream of enjoyment cease to flow. Another source of happiness is the consciousness of inspiring certain emotions in other minds, such as esteem, respect, confidence, love, gratitude, reverence, and the like. The desire for this is one of the strongest passions, and its gratification often secures the most exquisite enjoyment. This happiness, ordinarily, is proportioned to the nobleness of the person who renders this regard.