Why was Lincolnshire defeat in the 1858 senatorial race not considered a loss?

Abraham Lincoln's defeat in the 1858 senatorial race against Stephen A. Douglas was not seen as a loss because it significantly raised his national profile and established him as a leading figure in the Republican Party. Lincoln's eloquent debates with Douglas showcased his political acumen and moral clarity on issues like slavery, garnering him widespread recognition. This exposure laid the groundwork for his successful presidential campaign in 1860, positioning him as a strong contender for the presidency despite the senatorial defeat.