To put force, ability, or anything of the nature of an active faculty; to put in vigorous action; to bring into active operation; as, to exert the strength of the body, limbs, faculties, or imagination; to exert the mind or the voice.
To put forth, as the result or exercise of effort; to bring to bear; to do or perform.
There's a tremendous difference between alone and lonely. You could be lonely in a group of people. I like being alone. I like eating by myself. I go home at night and just watch a movie or hang out with my dog. I have to exert myself and really say, oh God, I've got to see my friends 'cause I'm too content being by myself. Drew Barrymore
The power I exert on the court depends on the power of my arguments, not on my gender. Sandra Day O'Connor
There is an atmosphere about the picture theatre that speaks of entertainment and relaxation. The charming surroundings, good music, and the fact that each visitor is determined to enjoy a few hours of holiday all exert an influence on the mind. Ivor Novello
The leader can never close the gap between himself and the group. If he does, he is no longer what he must be. He must walk a tightrope between the consent he must win and the control he must exert. Vince Lombardi
Negation is the mind's first freedom, yet a negative habit is fruitful only so long as we exert ourselves to overcome it, adapt it to our needs; once acquired it can imprison us. Emile M. Cioran