(noun) Striving; earnest endeavor; hard work.
"Strive to be the reason that someone feels loved today."
"Strive not with your superiors in argument, but always submit your judgement to others with modesty."
"We live in an age when unnecessary things are our only necessities."
"Man is a goal-seeking animal. His life only has meaning if he is reaching out and striving for his goals."
"Whenever a man does a thoroughly stupid thing, it is always from the noblest motives."