No man can serve two masters.
This sentence sounds me as (No man can provide service to two masters) but it's absurd. So I must be wrong.
Could you explain what the sentence means? (particularly - serve two masters)
When in doubt, look for context.
The following is taken from a discussion on Faith:Why do so many of us feel that we have to make a choice between being loyal to [one thing] and loyal to [another]? Is it simply that, as the Bible suggests, “No man can serve two masters, for either he will hate the one and despise the other, or he will hold to the one and despise the other”?