To make efforts; to use exertions; to endeavor with earnestness; to labor hard.
To struggle in opposition; to be in contention or dispute; to contend; to contest; -- followed by against or with before the person or thing opposed; as, strive against temptation; strive for the truth.
Don't worry when you are not recognized, but strive to be worthy of recognition. Abraham Lincoln
A return to first principles in a republic is sometimes caused by the simple virtues of one man. His good example has such an influence that the good men strive to imitate him, and the wicked are ashamed to lead a life so contrary to his example. Niccolo Machiavelli
Competition has been shown to be useful up to a certain point and no further, but cooperation, which is the thing we must strive for today, begins where competition leaves off. Franklin D. Roosevelt