The Basis of Morality by Part 2 Chapter 6 Page 9

peering through every veil cast over it, and may especially be detected in the fact that our dealings with all those, who come across our path, are directed by the one object of trying to find, before everything else, and as if by instinct, a possible means to any of the numerous ends with which we are always engrossed. When we make a new acquaintance, our first thought, as a rule, is whether the man can be useful to us in some way. If he can do nothing for our benefit, then as soon as we are convinced of this, he himself generally becomes nothing to us.

To seek in all other people a possible means to our ends, in other words, to make them our instruments, is almost part of the very nature of human eyes; and whether the instrument will have to suffer more or less in the using, is a thought which comes much later,