英语翻译Never imagine yourself not to be otherwise than what it

这句话出自：Alice's Adventures in Wonderland
[1][otherwise than]与……不同的；∴[not otherwise than]就是“和...一样”
注明了(1)(2),为了免被绕进去,先按: (1)=(2)=same; (3)=different
[2][what...]这一系列都是名词从句,已经帮你把它们划分好.A,B,C代表了三件事情.
【1】
Never imagine yourself [not to be otherwise than] (1)【what it might appear to others】(A)
that 【what you were (or might have been)】(B) was [not otherwise than] (2) 【what you had been】(C) would [have appeared to them] [to be otherwise].
按上述所说做代换：
Never imagine yourself to be same as A that B was same to C would [have appeared to them] different.
于是,所要陈述的逻辑简述为：
【don't imagine yourself = A {that B = C} would look different.】
【翻译】
曾经别人认为,你总是和之前一样不会改变的,如今他们还以为你仍然如此.
而你不必在意他们的看法,不要因此而否定自己,要相信自己,做好自己,证明给他们看.