“.. we must begin to love in order not to fall ill, ...”

“Here we may even venture to touch on the question of what makes it necessary at all for our mental life to pass beyond the limits of narcissism and to attach the libido to objects. The answer which would follow from our line of thought would once more be that this necessity arises when the cathexis of the ego with libido exceeds a certain amount. A strong egoism is a protection against falling ill, but in the last resort we must begin to love in order not to fall ill, and we are bound to fall ill if, in consequence of frustration, we are unable to love.”

― Sigmund Freud, On Narcissism: An Introduction