Jacobson 2:18-22
18 But someone will say, “You do algebra, and I do analysis.” Show me algebra without analysis, and I will show you my algebra by way of analysis. 19 You believe that there is one Field. You do well. Even the mathematicians believe—and tremble! 20 But do you want to know, O foolish graduate student, that algebra without analysis is dead? 21 Was not Cauchy our father justified by analysis when he offered geometry his son on the altar? 22 Do you see that algebra was working together with analysis, and by analysis, algebra was made perfect?