Many people don't believe there is a 绝对和永恒, therefore God will never go into their mind. Christians believe 绝对和永恒的 love, justice, but they are not in this world (or you can't get it from this world). 仁, apart from its implication of (not equal), is part of love for me.
只要对神负责就行了。
对神负责 necessarily needs to 对人负责. For true christian, 对人负责 is part of 对神负责, otherwise, why we are put onto this world by God?
A lot of comments here are purely from worldly view, so they are not about Christianality as a faith at all. At most, it is about cultures influenced by Christianality.