[spatso]

Thus, the Christian takes on the being and Spirit of Christ. His total allegiance is to The Living God. He will not sacrifice himself for “the common good” or “higher causes.”

I am not sure what you mean by this. If you have ever experienced a Christian missionary community you will see great sacrifice for the common good or higher cause. Often missionaries, especially in hospitals, work across faith lines responding simply to the need of the suffering.

[IbJensen]

I am not sure what you mean by this.

What the author is saying, I believe, is that if one 'believes' he should be sacrificing himself for such socialist claptrap as the 'common good' or 'higher cause' he has turned his back on God.

A Christian community, such as a mission or a monastery is different because these entities are wholly serving God. Through community they assist one another, but indeed the concentration is God and works pleasing to Him.

[MSSC6644]

Often missionaries, especially in hospitals, work across faith lines responding simply to the need of the suffering

But the suffering is done by individuals. Christ died for the sins of individuals. We live, we give, we sin, we die as individuals.