Persevering

Definition: persisting in pursuing something in spite of obstacles, opposition, or discouragement; steadfast in purpose
     See also: Stick-to-itive

Synonyms: constant, indefatigable, resolute, tenacious, undeterred

Quotes:
• Great works are performed not by strength, but by perseverance. — Samuel Johnson (1709-1784) English author
• Sometimes things aren’t clear right away. That’s where you need to be patient and persevere and see where things lead. — Mary Caroline Pierce (1945-) French tennis player