'Fall' in the Bible

Consider it nothing but joy, my brothers and sisters, whenever you fall into various trials.

For we all stumble and sin in many ways. If anyone does not stumble in what he says [never saying the wrong thing], he is a perfect man [fully developed in character, without serious flaws], able to bridle his whole body and rein in his entire nature [taming his human faults and weaknesses].

But above all, my fellow believers, do not swear, either by heaven or by earth or with any other oath; but let your yes be [a truthful] yes, and your no be [a truthful] no, so that you may not fall under judgment.