strive after

strive after something

to try very hard to obtain something. I am always striving after perfection. Ted was striving after a promotion and finally got it.
See also: after, strive
References in classic literature ?
Not alone because of the privacy and holiness of the subject, but because of what might have been prudery in the middle class, but which in them was the modesty and reticence found in individuals of the working class when they strive after clean living and morality.