Tā de chénggōng shì qínfèn shǐrán, bìng fēi ǒurán.
His success was the result of diligence, not coincidence.
Tips
grammar
使然 is a literary construction meaning 'caused to be so.' It typically follows a noun or noun phrase (形势使然, 天性使然) and functions like English 'owing to X' or 'as X dictates.' It is rarely used in casual speech.
