Verb
To persist in any business or enterprise undertaken; to pursue steadily any project or course begun; to maintain a purpose in spite of counter influences, opposition, or discouragement; not to give or abandon what is undertaken.
Source: Webster's dictionaryTo persevere in one's duty, and be silent is the best answer to calumny. George Washington
I think a hero is an ordinary individual who finds strength to persevere and endure in spite of overwhelming obstacles. Christopher Reeve
Friends are as companions on a journey, who ought to aid each other to persevere in the road to a happier life. Pythagoras
Give us grace and strength to forbear and to persevere. Give us courage and gaiety and the quiet mind, spare to us our friends, soften to us our enemies. Robert Louis Stevenson
Persevere like a bird in the wind. Samoan Proverb
It is better to turn back than to persevere in an evil course. Latin Proverb