Northwestern University西北大學校訓是:Whatsoever Things Are True。即:凡事求真。
這句校訓是摘自于新約圣經的腓利比書第四章8節。全句是“Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things”
中文意思是:“我還有未盡的話.凡是真實的、可敬的、公義的、清潔的、可愛的、有美名的.若有甚么德行、若有甚么稱贊、這些事你們都要思念。” 腓利比書是在公元一世紀,在羅馬帝國殖民統治時期,圣使徒保羅寫給腓利比教會基督徒的勉勵。