“We have to face the fact that we are the descendants of apelike ancestors. The truth, at first sight, is often ugly and repulsive to our personal feelings, but when it is the truth, its ultimate effects on us are always salutary. ...
... Man's brain does not stand as a thing apart; it is the culmination of an ascending series. There is no part of it and no function manifested by it that cannot be traced to humble beginnings lower in the animal scale. And what we postulate for man's brain we must in all justice apply to that of the ape, the dog, and all other beasts.”

“The way of the superior man may be compared to what takes place in traveling, when to go to a distance we must first traverse the space that is near, and in ascending a height, when we must begin from the lower ground.”

“We have magnificent brains—and use them to believe nonsense and behave as fools. . . . We are enslaved to delusions and too often the servants of subconscious biases. . . . Our great challenge is to use our brains to overcome our brains.”

“We accustom ourselves and our children to hypocrisy, to the practice of a double-faced morality. And since the brain is ill at ease among lies, we cheat ourselves with sophistry. Hypocrisy and sophistry become the second nature of the civilized man. But a society cannot live thus; it must return to truth or cease to exist.”

“Not only we can say that we cannot overload our brain, but we also know that our brain retains everything. The difficulty does not come with the input of information, but in getting it out.”

“As if to demonstrate, by a striking example, the impossibility of erecting any cerebral barrier between man and the apes, Nature has provided us, in the latter animals, with an almost complete series of gradations from brains little higher than that of a Rodent, to brains little lower than that of Man.”

“We value things like stability, control and feeling good. We often see truth as an oppositional force to these things, when in reality, truth is our only way of actually achieving these things.”

“We have a conditional relationship with the truth. We only want truth if it makes us feel more stable. We only want truth if it makes us feel more in control. We only want truth if it makes us feel good. And this conditional relationship that we have with the truth will be our downfall.”

“When we hear of carbon beginning to appear in the ascending series of rocks, we are unavoidably led to consider it”

“We want the mathematical genius - there is work for him. We want the literary genius - there is work for him, especially in my office. We want the scientific brain - there is more than enough work for him. We want the man of brains and we want the man of common sense and little brain. We want the man of initiative and the man of action, the methodical man and even the crank. We open our ranks widely to all.”