Nin knew how much humans loved money, riches, and material things though he never really could understand why. The more technologically advanced the human species got, the more isolated they seemed to become, at the same time. It was alarming, how humans could spend entire lifetimes engaged in all kinds of activities, without getting any closer to knowing who they really were, inside.
Let us admit, without bitterness, that the individual has his distinct interests and can, without felony, stipulate for those interests and defend them. The present has its pardonable amount of egotism; momentary life has its claims, and cannot be expected to sacrifice itself incessantly to the future. The generation which is in its turn passing over the earth is not forced to abridge its life for the sake of the generations, its equals after all, whose turn shall come later on.
In this atmosphere of general discouragement, it is tempting to attack something that is sufficiently linked to the powers-that-be so as not to appear very sympathetic, but sufficiently weak to be a more-or-less accessible target (since the concentration of power and money are beyond reach). Science fulfills these conditions, and this partly explains the attacks against it.