Men fail much oftener from want of perseverance than from want of talent

Men of integrity are generally pretty obstinate, in adhering to an opinion once adopted.

If you have talent as a screenwriter, it will out. Nothing succeeds like perseverance. Never give up. Anyway, life never turns out the way you imagine, dream or plan it to. Or hadn't you heard?

Without perseverance talent is a barren bed

Perseverance and tact are the two great qualities most valuable for all men who would mount, but especially for those who have to step out of the crowd

But Hercules himself must yield to odds; And many strokes, though with a little axe, Hews down and fells the hardest-timbered oak.