concern oneself with

When she spoke to her class at graduation, at the request of her peers—the first time a student had done so—she spoke about the need to concern oneself with justice locally and in the world at large, and she spoke about the need for respect: “The struggle for an integrated life existing in an atmosphere of communal trust and respect is one with desperately important political and social consequences. And the word ‘consequences’ of course catapults us into the future.

It would be an encroachment upon his privileges to concern oneself with them.

The thing to concern oneself with is the question, "which of these makes the nearer approach to the truth?"

There can be no doubt that to concern oneself with such illusions, to examine into and lengthily debate such idle propositions, is nothing but a waste of time and a marring of the days of one’s life.

The virtues are a tendency to mysticism, a need to concern oneself with the unseen; the vices, a non-immunity to fanaticism and bigotry.