And ye have murmured because he hath been plain unto you. Ye say that he hath used sharpness; ye say that he hath been angry with you; but behold, his sharpness was the sharpness of the power of the word of God, which was in him; and that which ye call anger was the truth, according to that which is in God, which he could not restrain, manifesting boldly concerning your iniquities.
And it must needs be that the power of God must be with him, even unto his commanding you that ye must obey. But behold, it was not he, but it was the Spirit of the Lord which was in him, which opened his mouth to utterance that he could not shut it.
It’s interesting that Laman and Lemuel had apparently been claiming that Nephi had been angry with them; for those keeping count, 1 Nephi records Laman and Lemuel getting angry with Nephi some 7 times (and doubtless there were more instances than recorded) and while Nephi later does allude to feeling some similar feelings in reverse (2 Nephi 4:27), he’s not the one making semi-regular murder attempts. Projection is a very real thing, in many areas (as a rather bizarre online conversation recently demonstrated to me).
We can, of course, be both Laman and Nephi. Sometimes we have to receive the word of God in sharpness and correction, to which we should respond not with anger but with a penitent heart. And then sometimes we’re called upon by the spirit to say something, in which case we’d better be sure we’re listening to the spirit and not any anger or pride of our own.