The plays and sports of children are as salutary to them as labor and work are to grown persons.
False facts are highly injurious to the progress of science for they often endure long but false views if supported by some evidence do little harm for every one takes a salutary pleasure in proving their falseness.
Alone let him constantly meditate in solitude on that which is salutary for his soul for he who meditates in solitude attains supreme bliss.
There is no scientific reason to think that we even with space travel are going to survive as a species for ever certainly not by biting off the hand that feeds us which is exactly what we are doing.