Translation of "cannot help but" into Japanese

When I give thought to the many elements in nature, I cannot help but believe in a Creator.

自然界の様々な物事を考えると,創造者の存在を信じざるを得ません。

I cannot help but cry when I think about how hard my parents had to endure at that time .

この 時 の 両親 の 腹 の 中 は 、 今 から 考え る と 涙 な き を 得 な い 。