麻烦大家分析一下这句话的语法结构，各成分的内容!!

The essence of our effort to see that every child has a chance (主语)
must be to assure each an equal opportunity, not to become same, but to become different--谓语
to realize whatever unique potential of body, mind, and spirit he or she possesses. 补语
细分:The essence of our effort 主语中心语
to see that every child has a chance 不定式做主语的定语
be to assure each an equal opportunity, 谓语中心语
not to become same, but to become different谓语补足语,二者为并列关系
to realize whatever unique potential of body, mind, and spirit补语中心语
he or she possesses补语的定语

(The essence of our effort) [to see that (every child has a chance)] must be (to assure each an equal opportunity), not( to become same), but (to become different)--[to realize whatever unique potential of body, mind, and spirit (he or she possesses)].
第一个小括号内为主语；紧跟的中括号内为定语修饰主语，中括号内的小括号为that从句即see的宾语从句；后面紧跟的几个小括号为并列表语从句，最后的中括号的内容为补语，最后中括号内有一个定语从句，即小括号内容，修饰body,mind,spirit。
be to 表示目的，包括 must be to,n