I believe what Russell was stating was that we not only need to nourish our bodies, we also need to tend to our minds as well. We must be careful not to sink into monotony, because when we do we tend to fall back to the base instincts of operating on routine rather than using our minds. When this happens we risk starving ourselves intellectually.
The whole basis of philosophy is that there is no right answer, philosophers debate and never come to any real conclusion. Basically the foundation of philosophy is the opinion of one or many, and when an answer has been validated, it shifts from opinion into fact. Once it becomes a fact, it falls into the science of facts vs falsehoods. One example would be the original thought of the sun revolving around the earth, at the time that was a Fact. After much research it became disputed and opinionated. Now, everyone knows for a fact that the Earth is revolving around the sun instead of vice-versa
Is there a God? This question will remain insoluble because science cannot prove or disprove the existence of a higher power.
Is there intelligent life in out there? This chance of this question being answered is relatively higher than the previous. But currently it is insoluble due to a lack of interest in that field.
Is there an afterlife? This will be insoluble because it is impossible to discern due to it being impossible without experiencing it first-hand.
What is the meaning of life?This question (for some reason) is on many peoples minds, but to most it will remain a mystery.
When is the end? This day and age seems to be riddled with people who are doomsayers, who think they can see the apocalypse approaching. But in truth, no one knows how it will end, its all speculation.
To me it sounds like Russell is attempting to explain that the journey through life tends to wear on most people, until they just shuffle from one day to the next, from “cradle to grave”. They ask no questions, have no