I do the very best I know how, the very best I can, and I mean to keep on doing so until the end

Doing your best means never stop trying.

Things may come to those who wait...but only the things left by those who hustle.

I don't like that man. I must get to know him better.

I can see how it might be possible for a man to look down upon the earth and be an atheist, but I cannot conceive how he could look up into the heavens and say there is no God.

I do the very best I know how - the very best I can; and I mean to keep on doing so until the end.