persever- +

By discipline, fidelity, and perseverance.

A motto of fortitude and steadfastness.

With patience and perseverance.

1. Steady persistence in adhering to a course of action, a belief, or a purpose; steadfastness.
2. Determined continuation with something: the steady and continued action or belief, usually over a long period and especially despite difficulties or setbacks.
3. In theology, the Calvinistic doctrine that those who have been chosen by God will continue in a state of grace to the end and will finally be saved; while in the Roman Catholic Church, belief in God's grace and the belief that God's grace lasts to the end of somebody's life if that person has maintained his or her good works and faith.

Doggedness, steadfastness, persistence, tenacity, pertinacity

Perseverance commonly suggests activity maintained in spite of difficulties or steadfast and long-continued application: "Endurance and perseverance combined to win in the end."

It is regularly used in a favorable sense; however, persistence, which may be used in either a favorable or an unfavorable sense, implies unremitting (and sometimes annoying) perseverance: persistence in a belief; persistence in talking when others want to study.

Tenacity, with the original meaning of adhesiveness, as of glue, is a dogged and determined holding on. Whether used literally or figuratively it has favorable implications; such as, "a bulldog quality of tenacity"; "the tenacity of one's memory".

Pertinacity, unlike its related word, is used chiefly in an unfavorable sense, that of overinsistent tenacity: the pertinacity of a social climber.

By perseverance.

Motto on the seal of the State of Virginia, USA.

Constant in pursuit of an undertaking.

By perseverance to the wished-for end.

A motto of perseverance and steadfastness.

Perseverance conquers all things.

Perseverance succeeds [overcomes or conquers].

1. To persist in or to remain constant to a purpose, idea, or task in the face of obstacles or discouragement.
2. To persist steadily in an action or belief, usually over a long period and especially despite problems or difficulties.
3. To be persistent, to refuse to stop.
4. Etymology: from Old French perseverer, from Latin perseverare, "to continue steadfastly, to persist"; from persevereus, "very strict, earnest", from per-, "very" plus severus, "strict".

I persevere.

Consider the postage stamp: its usefulness consists in the ability to stick to one thing until it gets there: perseverence quotes.