the second essay expects to know these ( on a very broad level)
how the person thinks, what he thinks about and how much he is influenced by these thoughts.
It is actually a beautiful essay topic, as it would be difficult to write about something in 2000 words if you dont whole heartedly feel about the topic.
some of my friends suggested had told me : write about things like 'my birth' and some similar topics.
see ,the issue here is that , you have to realise that this essay will portray a virtual picture abt the kind of person you are viz, are you a visionary, are you altrusitic, responsible, open to others feelings and inputs, potential to show leadership,team player, how well informed about reality, etc etc...
So as soon as the adcom finish reading this essay, they will have constructed a picture that reflects their opinion of you as a prospective Oxford mgmt student.
so if i were to write about 'my birth' , then i'm sure i would not have been able to show the adcom the above mentioned qualities in myself... so i suggest to prospective applicants.. write something that involves more than yourself .
btw.. 'my birth' ... well there was nothing great for anybody and sometimes if i think , not even for myself... prob my family could have written 2000 words on this topic, but not me..

best of luck