To understand all the aspects of the world, we must study all the sciences.
In fact, feeling sure of a thing is no guarantee of truth.
If we are to continue alive, we must constantly adjust ourselves to the forces of the world in which we live
The man is sensitive and has the power of action, the power of moving himself.
Our usual inability to make such predictions in the case of human beings is not because human beings are not subject to the law of cause and effect, it is not that their acts are due to chance, but that the factors involved are usually many, and it is difficult for us to find out all of them.
The scientific man, then, sees more significance, more meaning, in things and events than does the non-scientific man.
Later, the shrinking and warping earth-crust lifted the rock far above the level of the sea, and it may now be found at the top of the mountain
Grade the work by finding the number of letters reproduced, taking no account of the position of the letters.
The brain has still another important characteristic. After it has been stimulated through sense organ and nerve, a similar brain activity can be revived later, and this revival is the basis of memory. When the brain is agitated through the medium of a sense organ, we have sensation; when this agitation is revived later, we have a memory idea. A study of consciousness, or mind, the conditions under which it arises, and all the other problems involved, give us the other part of the field of psychology.
The subject of the association of ideas can best be introduced by an experiment. Take a paper and pencil, and think of the word “horse.” Write this word down, and then write down other words that come to mind. Write them in the order in which they come to mind. Do this for three or four minutes, and try the experiment several times, beginning with a different word each time. Make a study of the lists of words. Compare the different lists and the lists written by different students.
