"For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin.
"Let us therefore come boldly unto the throne of grace, that we may obtain mercy and find grace to help in time of need." (Hebrews 4:15-16)
From the Book of Mormon:
"And he shall go forth, suffering pains and afflictions and temptations of every kind; and this that the word might be fulfilled which saith he will take upon him the pains and the sicknesses of his people.
"And he will take upon him death, that he may loose the bands of death which bind his people; and he will take upon him their infirmities, that his bowels may be filled with mercy, according to the flesh, that he may know according to the flesh how to *succor his people according to their infirmities." (Alma 7:11-12)
*succor - origin: Middle English, via Old French from medieval Latin succurus, from Latin succurrere 'run to the help of'. (New Oxford American Dictionary) Christ wants to "run to help us".