'Doubt' in the Bible

And I was with you without strength, in fear and in doubt.

Or saith he it altogether for our sakes? For our sakes, no doubt, this is written: that he that ploweth should plow in hope; and that he that thresheth in hope should be partaker of his hope.

That is how I run, not being in any doubt as to my goal. I am a boxer who does not inflict blows on the air,