Russell explains that philosophy aims at a type of knowledge that gives unity and system to the body of

Science

Explanation:

The great philosopher and mathematician Bertrand Russell used to see the value of philosophy,  almost from an epistemological point of view. To him, the worth of philosophy is to prove the validity of convictions and at the same time, to make the Science as solid and profound as possible.

He did that in Philosophy of Science, in Mathematics.

because he is that the right

answer; the sound of a train whistle makes a woman think of an old friend; //

the smell of grass makes a by feel that spring is the best; (apex);