When I say that all men have the mind which cannot bear to see the suffering of others, my meaning is illustrated this way: when two men suddenly see a child about to fall into a well, they all have a feeling of alarm and distress, not to gain friendship with the child's parents, nor to seek the praise of their neighbors and friends. From such a case, we see that a man without the feeling of commiseration is not a man. The feeling of commiseration is the beginning of humanity.
MenciusIt is true that water will flow indifferently to east and west, but will it flow equally well up and down? Human nature is disposed toward goodness, just as water tends to flow downwards. There is no water but flows downwards, and no man but shows his tendency to be good. Now, by striking water hard, you may splash it higher than your forehead, and by damming it, you may make it go uphill. But, is that the nature of water? It is external force that causes it to do so. Likewise, if a man is made to do what is not good, his nature is being similarly forced.
Mencius