'Man's' in the Bible

And from this we learn that everything is dependent not on man's will or endeavour, but upon God who has mercy. For the Scripture said to Pharaoh,

One man's faith allows him to eat anything, while a man of weaker faith eats nothing but vegetables.

making it my ambition, however, not to tell the Good News where Christ's name was already known, for fear I should be building on another man's foundation.