In days of doubt in days of dreary musings on my country's fate you alone are my comfort and support oh great powerful righteous and free Russian language!

I was a little doubtful about the propriety of going to the Mammoth Cave without a gentleman escort but if two ladies travel alone they must have the courage of men.

He was thinking alone and seriously racking his brain to find a direction for this single force four times multiplied with which he did not doubt as with the lever for which Archimedes sought they should succeed in moving the world when some one tapped gently at his door.

Yes I will bring the understanding of a woman to the Court but I doubt that alone will affect my decisions.

Doubt of whatever kind can be ended by action alone.

Brain power improves by brain use just as our bodily strength grows with exercise. And there is no doubt that a large proportion of the female population from school days to late middle age now have very complicated lives indeed.

Nearly all the powerful people of this age are unbelievers the best of them in doubt and misery the most in plodding hesitation doing as well as they can what practical work lies at hand.